diff --git a/Doc/c-api/long.rst b/Doc/c-api/long.rst
index 582f5c7bf05471..adef8388b1afe6 100644
--- a/Doc/c-api/long.rst
+++ b/Doc/c-api/long.rst
@@ -464,3 +464,11 @@ distinguished from a number.  Use :c:func:`PyErr_Occurred` to disambiguate.
 
    Otherwise, the return value is undefined.
 
+.. c:function:: int PyLong_FileDescriptor_Converter(PyObject *p, void *ptr)
+
+   Convert a Python object to a file descript (C ``int`` type).
+   Set *\*ptr* and return ``1`` on success.
+   Set an exception and return ``0`` on error.
+
+   It can be used with the ``O&`` format when :ref:`parsing arguments
+   <arg-parsing>`.
diff --git a/Doc/data/stable_abi.dat b/Doc/data/stable_abi.dat
index 25629b4da053da..411657678d074b 100644
--- a/Doc/data/stable_abi.dat
+++ b/Doc/data/stable_abi.dat
@@ -363,6 +363,7 @@ function,PyLong_AsUnsignedLongLong,3.2,,
 function,PyLong_AsUnsignedLongLongMask,3.2,,
 function,PyLong_AsUnsignedLongMask,3.2,,
 function,PyLong_AsVoidPtr,3.2,,
+function,PyLong_FileDescriptor_Converter,3.13,,
 function,PyLong_FromDouble,3.2,,
 function,PyLong_FromLong,3.2,,
 function,PyLong_FromLongLong,3.2,,
diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
index 51939909000960..b99d95575e171b 100644
--- a/Doc/whatsnew/3.13.rst
+++ b/Doc/whatsnew/3.13.rst
@@ -1645,6 +1645,10 @@ New Features
   between native integer types and Python :class:`int` objects.
   (Contributed by Steve Dower in :gh:`111140`.)
 
+* Add :c:func:`PyLong_FileDescriptor_Converter` function: convert a Python
+  object to a file descriptor. Function added the limited C API.
+  (Contributed by Victor Stinner in :gh:`116646`.)
+
 
 Porting to Python 3.13
 ----------------------
diff --git a/Include/cpython/fileutils.h b/Include/cpython/fileutils.h
index b386ad107bde1f..723b4cba1047b8 100644
--- a/Include/cpython/fileutils.h
+++ b/Include/cpython/fileutils.h
@@ -6,3 +6,6 @@
 PyAPI_FUNC(FILE*) _Py_fopen_obj(
     PyObject *path,
     const char *mode);
+
+// Alias kept for backward compatibility with Python 3.12
+#define _PyLong_FileDescriptor_Converter PyLong_FileDescriptor_Converter
diff --git a/Include/fileutils.h b/Include/fileutils.h
index 1509198e45f0ca..24feba288076d6 100644
--- a/Include/fileutils.h
+++ b/Include/fileutils.h
@@ -50,6 +50,12 @@ PyAPI_FUNC(char*) Py_EncodeLocale(
     size_t *error_pos);
 #endif
 
+#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x030d0000
+// PyArg converter to convert a Python int objet to a C int.
+// Return 1 on success. Set an exception and return 0 on error.
+PyAPI_FUNC(int) PyLong_FileDescriptor_Converter(PyObject *, void *);
+#endif
+
 #ifndef Py_LIMITED_API
 #  define Py_CPYTHON_FILEUTILS_H
 #  include "cpython/fileutils.h"
diff --git a/Include/internal/pycore_fileutils.h b/Include/internal/pycore_fileutils.h
index 5c55282fa39e6f..4359d215c38e22 100644
--- a/Include/internal/pycore_fileutils.h
+++ b/Include/internal/pycore_fileutils.h
@@ -312,9 +312,6 @@ extern HRESULT PathCchSkipRoot(const wchar_t *pszPath, const wchar_t **ppszRootE
 #  define _Py_END_SUPPRESS_IPH
 #endif /* _MSC_VER >= 1900 */
 
-// Export for 'select' shared extension (Argument Clinic code)
-PyAPI_FUNC(int) _PyLong_FileDescriptor_Converter(PyObject *, void *);
-
 // Export for test_peg_generator
 PyAPI_FUNC(char*) _Py_UniversalNewlineFgetsWithSize(char *, int, FILE*, PyObject *, size_t*);
 
diff --git a/Lib/test/test_stable_abi_ctypes.py b/Lib/test/test_stable_abi_ctypes.py
index 8bd373976426ef..8412362359b516 100644
--- a/Lib/test/test_stable_abi_ctypes.py
+++ b/Lib/test/test_stable_abi_ctypes.py
@@ -396,6 +396,7 @@ def test_windows_feature_macros(self):
     "PyLong_AsUnsignedLongLongMask",
     "PyLong_AsUnsignedLongMask",
     "PyLong_AsVoidPtr",
+    "PyLong_FileDescriptor_Converter",
     "PyLong_FromDouble",
     "PyLong_FromLong",
     "PyLong_FromLongLong",
diff --git a/Misc/NEWS.d/next/C API/2024-03-12-13-56-14.gh-issue-116646.sW27CQ.rst b/Misc/NEWS.d/next/C API/2024-03-12-13-56-14.gh-issue-116646.sW27CQ.rst
new file mode 100644
index 00000000000000..bc7b0abb309950
--- /dev/null
+++ b/Misc/NEWS.d/next/C API/2024-03-12-13-56-14.gh-issue-116646.sW27CQ.rst	
@@ -0,0 +1,2 @@
+Add PyLong_FileDescriptor_Converter function: convert a Python object to a
+file descriptor. Function added the limited C API. Patch by Victor Stinner.
diff --git a/Misc/stable_abi.toml b/Misc/stable_abi.toml
index ca7cf02961571e..2632b5c43c3272 100644
--- a/Misc/stable_abi.toml
+++ b/Misc/stable_abi.toml
@@ -2496,3 +2496,5 @@
 [typedef.PyCFunctionFastWithKeywords]
     added = '3.13'
     # "abi-only" since 3.10.  (Same story as PyCFunctionFast.)
+[function.PyLong_FileDescriptor_Converter]
+    added = '3.13'
diff --git a/Modules/clinic/fcntlmodule.c.h b/Modules/clinic/fcntlmodule.c.h
index 5dc2fc068d0f7e..69dfc9f40d767b 100644
--- a/Modules/clinic/fcntlmodule.c.h
+++ b/Modules/clinic/fcntlmodule.c.h
@@ -2,7 +2,6 @@
 preserve
 [clinic start generated code]*/
 
-#include "pycore_fileutils.h"     // _PyLong_FileDescriptor_Converter()
 #include "pycore_modsupport.h"    // _PyArg_CheckPositional()
 
 PyDoc_STRVAR(fcntl_fcntl__doc__,
@@ -38,7 +37,7 @@ fcntl_fcntl(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("fcntl", nargs, 2, 3)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     code = PyLong_AsInt(args[1]);
@@ -108,7 +107,7 @@ fcntl_ioctl(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("ioctl", nargs, 2, 4)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     code = (unsigned int)PyLong_AsUnsignedLongMask(args[1]);
@@ -158,7 +157,7 @@ fcntl_flock(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("flock", nargs, 2, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     code = PyLong_AsInt(args[1]);
@@ -218,7 +217,7 @@ fcntl_lockf(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("lockf", nargs, 2, 5)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     code = PyLong_AsInt(args[1]);
@@ -246,4 +245,4 @@ fcntl_lockf(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=732e33ba92042031 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=e6c003d9d31b3ef4 input=a9049054013a1b77]*/
diff --git a/Modules/clinic/posixmodule.c.h b/Modules/clinic/posixmodule.c.h
index b7338d138e91ce..98477592ba1b3e 100644
--- a/Modules/clinic/posixmodule.c.h
+++ b/Modules/clinic/posixmodule.c.h
@@ -7,7 +7,6 @@ preserve
 #  include "pycore_runtime.h"     // _Py_ID()
 #endif
 #include "pycore_abstract.h"      // _PyNumber_Index()
-#include "pycore_fileutils.h"     // _PyLong_FileDescriptor_Converter()
 #include "pycore_long.h"          // _PyLong_UnsignedInt_Converter()
 #include "pycore_modsupport.h"    // _PyArg_UnpackKeywords()
 
@@ -481,7 +480,7 @@ os_fchdir(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *k
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     return_value = os_fchdir_impl(module, fd);
@@ -1024,7 +1023,7 @@ os_fsync(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kw
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     return_value = os_fsync_impl(module, fd);
@@ -1107,7 +1106,7 @@ os_fdatasync(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     return_value = os_fdatasync_impl(module, fd);
@@ -4531,7 +4530,7 @@ os_grantpt(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = os_grantpt_impl(module, fd);
@@ -4567,7 +4566,7 @@ os_unlockpt(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = os_unlockpt_impl(module, fd);
@@ -4604,7 +4603,7 @@ os_ptsname(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = os_ptsname_impl(module, fd);
@@ -4664,7 +4663,7 @@ os_login_tty(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = os_login_tty_impl(module, fd);
@@ -5881,7 +5880,7 @@ os_setns(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kw
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (!noptargs) {
@@ -6322,7 +6321,7 @@ os_timerfd_settime(PyObject *module, PyObject *const *args, Py_ssize_t nargs, Py
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (!noptargs) {
@@ -6435,7 +6434,7 @@ os_timerfd_settime_ns(PyObject *module, PyObject *const *args, Py_ssize_t nargs,
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (!noptargs) {
@@ -6495,7 +6494,7 @@ os_timerfd_gettime(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = os_timerfd_gettime_impl(module, fd);
@@ -6529,7 +6528,7 @@ os_timerfd_gettime_ns(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = os_timerfd_gettime_ns_impl(module, fd);
@@ -9691,7 +9690,7 @@ os_fpathconf(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("fpathconf", nargs, 2, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (!conv_path_confname(args[1], &name)) {
@@ -10834,7 +10833,7 @@ os_eventfd_read(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObj
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     return_value = os_eventfd_read_impl(module, fd);
@@ -10896,7 +10895,7 @@ os_eventfd_write(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyOb
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (!_PyLong_UnsignedLongLong_Converter(args[1], &value)) {
@@ -12588,4 +12587,4 @@ os__supports_virtual_terminal(PyObject *module, PyObject *Py_UNUSED(ignored))
 #ifndef OS__SUPPORTS_VIRTUAL_TERMINAL_METHODDEF
     #define OS__SUPPORTS_VIRTUAL_TERMINAL_METHODDEF
 #endif /* !defined(OS__SUPPORTS_VIRTUAL_TERMINAL_METHODDEF) */
-/*[clinic end generated code: output=2965306970f31c5d input=a9049054013a1b77]*/
+/*[clinic end generated code: output=b0eb25df41f36dc7 input=a9049054013a1b77]*/
diff --git a/Modules/clinic/selectmodule.c.h b/Modules/clinic/selectmodule.c.h
index 67e76d4c89f59a..c576a64a0c98a3 100644
--- a/Modules/clinic/selectmodule.c.h
+++ b/Modules/clinic/selectmodule.c.h
@@ -6,7 +6,6 @@ preserve
 #  include "pycore_gc.h"          // PyGC_Head
 #  include "pycore_runtime.h"     // _Py_ID()
 #endif
-#include "pycore_fileutils.h"     // _PyLong_FileDescriptor_Converter()
 #include "pycore_long.h"          // _PyLong_UnsignedShort_Converter()
 #include "pycore_modsupport.h"    // _PyArg_CheckPositional()
 
@@ -100,7 +99,7 @@ select_poll_register(pollObject *self, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("register", nargs, 1, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (nargs < 2) {
@@ -148,7 +147,7 @@ select_poll_modify(pollObject *self, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("modify", nargs, 2, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (!_PyLong_UnsignedShort_Converter(args[1], &eventmask)) {
@@ -182,7 +181,7 @@ select_poll_unregister(pollObject *self, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = select_poll_unregister_impl(self, fd);
@@ -268,7 +267,7 @@ select_devpoll_register(devpollObject *self, PyObject *const *args, Py_ssize_t n
     if (!_PyArg_CheckPositional("register", nargs, 1, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (nargs < 2) {
@@ -318,7 +317,7 @@ select_devpoll_modify(devpollObject *self, PyObject *const *args, Py_ssize_t nar
     if (!_PyArg_CheckPositional("modify", nargs, 1, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (nargs < 2) {
@@ -356,7 +355,7 @@ select_devpoll_unregister(devpollObject *self, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = select_devpoll_unregister_impl(self, fd);
@@ -730,7 +729,7 @@ select_epoll_register(pyEpoll_Object *self, PyObject *const *args, Py_ssize_t na
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     if (!noptargs) {
@@ -806,7 +805,7 @@ select_epoll_modify(pyEpoll_Object *self, PyObject *const *args, Py_ssize_t narg
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     eventmask = (unsigned int)PyLong_AsUnsignedLongMask(args[1]);
@@ -874,7 +873,7 @@ select_epoll_unregister(pyEpoll_Object *self, PyObject *const *args, Py_ssize_t
     if (!args) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     return_value = select_epoll_unregister_impl(self, fd);
@@ -1311,4 +1310,4 @@ select_kqueue_control(kqueue_queue_Object *self, PyObject *const *args, Py_ssize
 #ifndef SELECT_KQUEUE_CONTROL_METHODDEF
     #define SELECT_KQUEUE_CONTROL_METHODDEF
 #endif /* !defined(SELECT_KQUEUE_CONTROL_METHODDEF) */
-/*[clinic end generated code: output=4c2dcb31cb17c2c6 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=6da67b9741f7ca95 input=a9049054013a1b77]*/
diff --git a/Modules/clinic/termios.c.h b/Modules/clinic/termios.c.h
index 1c340681e5862f..8ebec7b6384f10 100644
--- a/Modules/clinic/termios.c.h
+++ b/Modules/clinic/termios.c.h
@@ -2,7 +2,6 @@
 preserve
 [clinic start generated code]*/
 
-#include "pycore_fileutils.h"     // _PyLong_FileDescriptor_Converter()
 #include "pycore_modsupport.h"    // _PyArg_CheckPositional()
 
 PyDoc_STRVAR(termios_tcgetattr__doc__,
@@ -30,7 +29,7 @@ termios_tcgetattr(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = termios_tcgetattr_impl(module, fd);
@@ -69,7 +68,7 @@ termios_tcsetattr(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("tcsetattr", nargs, 3, 3)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     when = PyLong_AsInt(args[1]);
@@ -108,7 +107,7 @@ termios_tcsendbreak(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("tcsendbreak", nargs, 2, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     duration = PyLong_AsInt(args[1]);
@@ -139,7 +138,7 @@ termios_tcdrain(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = termios_tcdrain_impl(module, fd);
@@ -174,7 +173,7 @@ termios_tcflush(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("tcflush", nargs, 2, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     queue = PyLong_AsInt(args[1]);
@@ -213,7 +212,7 @@ termios_tcflow(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("tcflow", nargs, 2, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     action = PyLong_AsInt(args[1]);
@@ -246,7 +245,7 @@ termios_tcgetwinsize(PyObject *module, PyObject *arg)
     PyObject *return_value = NULL;
     int fd;
 
-    if (!_PyLong_FileDescriptor_Converter(arg, &fd)) {
+    if (!PyLong_FileDescriptor_Converter(arg, &fd)) {
         goto exit;
     }
     return_value = termios_tcgetwinsize_impl(module, fd);
@@ -280,7 +279,7 @@ termios_tcsetwinsize(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     if (!_PyArg_CheckPositional("tcsetwinsize", nargs, 2, 2)) {
         goto exit;
     }
-    if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) {
+    if (!PyLong_FileDescriptor_Converter(args[0], &fd)) {
         goto exit;
     }
     winsz = args[1];
@@ -289,4 +288,4 @@ termios_tcsetwinsize(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=f31382658135c774 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=a691628e3243b8ed input=a9049054013a1b77]*/
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index e30ab952dff571..b6792e56088542 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -221,7 +221,7 @@ PyObject_AsFileDescriptor(PyObject *o)
 }
 
 int
-_PyLong_FileDescriptor_Converter(PyObject *o, void *ptr)
+PyLong_FileDescriptor_Converter(PyObject *o, void *ptr)
 {
     int fd = PyObject_AsFileDescriptor(o);
     if (fd == -1) {
diff --git a/PC/python3dll.c b/PC/python3dll.c
index aa6bfe2c4022db..f49aea470240b1 100755
--- a/PC/python3dll.c
+++ b/PC/python3dll.c
@@ -346,6 +346,7 @@ EXPORT_FUNC(PyLong_AsUnsignedLongLong)
 EXPORT_FUNC(PyLong_AsUnsignedLongLongMask)
 EXPORT_FUNC(PyLong_AsUnsignedLongMask)
 EXPORT_FUNC(PyLong_AsVoidPtr)
+EXPORT_FUNC(PyLong_FileDescriptor_Converter)
 EXPORT_FUNC(PyLong_FromDouble)
 EXPORT_FUNC(PyLong_FromLong)
 EXPORT_FUNC(PyLong_FromLongLong)
diff --git a/Tools/clinic/clinic.py b/Tools/clinic/clinic.py
index 893f4cc12ed084..642ac763df9579 100755
--- a/Tools/clinic/clinic.py
+++ b/Tools/clinic/clinic.py
@@ -3844,11 +3844,7 @@ def parse_arg(self, argname: str, displayname: str, *, limited_capi: bool) -> st
 
 class fildes_converter(CConverter):
     type = 'int'
-    converter = '_PyLong_FileDescriptor_Converter'
-
-    def converter_init(self, *, accept: TypeSet = {int, NoneType}) -> None:
-        self.add_include('pycore_fileutils.h',
-                         '_PyLong_FileDescriptor_Converter()')
+    converter = 'PyLong_FileDescriptor_Converter'
 
     def _parse_arg(self, argname: str, displayname: str) -> str | None:
         return self.format_code("""