diff --git a/pandas/_libs/include/pandas/vendored/klib/khash_python.h b/pandas/_libs/include/pandas/vendored/klib/khash_python.h
index 5a933b45d9e21..8bb3f84369b0b 100644
--- a/pandas/_libs/include/pandas/vendored/klib/khash_python.h
+++ b/pandas/_libs/include/pandas/vendored/klib/khash_python.h
@@ -1,6 +1,9 @@
 // Licence at LICENSES/KLIB_LICENSE
 
+#pragma once
+
 #include <Python.h>
+#include <pymem.h>
 #include <string.h>
 
 typedef struct {
@@ -12,20 +15,8 @@ typedef struct {
   double imag;
 } khcomplex128_t;
 
-// khash should report usage to tracemalloc
-#if PY_VERSION_HEX >= 0x03060000
-#include <pymem.h>
-#if PY_VERSION_HEX < 0x03070000
-#define PyTraceMalloc_Track _PyTraceMalloc_Track
-#define PyTraceMalloc_Untrack _PyTraceMalloc_Untrack
-#endif
-#else
-#define PyTraceMalloc_Track(...)
-#define PyTraceMalloc_Untrack(...)
-#endif
-
 static const int KHASH_TRACE_DOMAIN = 424242;
-void *traced_malloc(size_t size) {
+static inline void *traced_malloc(size_t size) {
   void *ptr = malloc(size);
   if (ptr != NULL) {
     PyTraceMalloc_Track(KHASH_TRACE_DOMAIN, (uintptr_t)ptr, size);
@@ -33,7 +24,7 @@ void *traced_malloc(size_t size) {
   return ptr;
 }
 
-void *traced_calloc(size_t num, size_t size) {
+static inline void *traced_calloc(size_t num, size_t size) {
   void *ptr = calloc(num, size);
   if (ptr != NULL) {
     PyTraceMalloc_Track(KHASH_TRACE_DOMAIN, (uintptr_t)ptr, num * size);
@@ -41,7 +32,7 @@ void *traced_calloc(size_t num, size_t size) {
   return ptr;
 }
 
-void *traced_realloc(void *old_ptr, size_t size) {
+static inline void *traced_realloc(void *old_ptr, size_t size) {
   void *ptr = realloc(old_ptr, size);
   if (ptr != NULL) {
     if (old_ptr != ptr) {
@@ -52,7 +43,7 @@ void *traced_realloc(void *old_ptr, size_t size) {
   return ptr;
 }
 
-void traced_free(void *ptr) {
+static inline void traced_free(void *ptr) {
   if (ptr != NULL) {
     PyTraceMalloc_Untrack(KHASH_TRACE_DOMAIN, (uintptr_t)ptr);
   }