diff --git a/NEWS b/NEWS
index 19a6e7045c7b6..df968d86ccb45 100644
--- a/NEWS
+++ b/NEWS
@@ -34,6 +34,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-15432 (Heap corruption when querying a vector). (cmb,
     Kamil Tekiela)
 
+- Opcache:
+  . Fixed bug GH-15490 (Building of callgraph modifies preloaded symbols).
+    (ilutov)
+
 - PDO_MYSQL:
   . mysqlnd: support ER_CLIENT_INTERACTION_TIMEOUT. (Appla)
 
diff --git a/Zend/Optimizer/zend_call_graph.c b/Zend/Optimizer/zend_call_graph.c
index abd5dac533137..8a2f8ea2a7e1a 100644
--- a/Zend/Optimizer/zend_call_graph.c
+++ b/Zend/Optimizer/zend_call_graph.c
@@ -79,7 +79,8 @@ ZEND_API void zend_analyze_calls(zend_arena **arena, zend_script *script, uint32
 
 					if (build_flags & ZEND_CALL_TREE) {
 						call_info->next_caller = NULL;
-					} else if (func->type == ZEND_INTERNAL_FUNCTION) {
+					} else if (func->type == ZEND_INTERNAL_FUNCTION
+					 || func->op_array.filename != script->filename) {
 						call_info->next_caller = NULL;
 					} else {
 						zend_func_info *callee_func_info = ZEND_FUNC_INFO(&func->op_array);
diff --git a/ext/opcache/tests/jit/gh15490.inc b/ext/opcache/tests/jit/gh15490.inc
new file mode 100644
index 0000000000000..e702a9e244028
--- /dev/null
+++ b/ext/opcache/tests/jit/gh15490.inc
@@ -0,0 +1,9 @@
+<?php
+
+function foo() {
+    bar();
+}
+
+function bar() {
+    echo 'Hello world!';
+}
diff --git a/ext/opcache/tests/jit/gh15490.phpt b/ext/opcache/tests/jit/gh15490.phpt
new file mode 100644
index 0000000000000..95dc4aed8cea5
--- /dev/null
+++ b/ext/opcache/tests/jit/gh15490.phpt
@@ -0,0 +1,20 @@
+--TEST--
+GH-15490: use-after-free when traversing call graph
+--EXTENSIONS--
+opcache
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.file_update_protection=0
+opcache.preload={PWD}/gh15490.inc
+opcache.jit=1235
+--SKIPIF--
+<?php
+if (PHP_OS_FAMILY == 'Windows') die('skip Preloading is not supported on Windows');
+?>
+--FILE--
+<?php
+foo();
+?>
+--EXPECT--
+Hello world!