diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index 82066099f01fb..50bc4c9fbea07 100644
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -61,6 +61,7 @@ PHP 8.4 INTERNALS UPGRADE NOTES
    - Symbol HAVE_JSON has been removed (ext/json is always available since PHP
      8.0).
    - Symbol DARWIN has been removed (use __APPLE__ to target Darwin systems).
+   - Symbol MISSING_FCLOSE_DECL and M4 macro PHP_MISSING_FCLOSE_DECL removed.
 
  c. Windows build system changes
    - The configure options --with-oci8-11g, --with-oci8-12c, --with-oci8-19 have
diff --git a/build/php.m4 b/build/php.m4
index 68d2bd895e5e2..a6707abed4506 100644
--- a/build/php.m4
+++ b/build/php.m4
@@ -1286,22 +1286,6 @@ if test "$ac_cv_struct_flock" = "yes" ; then
 fi
 ])
 
-dnl
-dnl PHP_MISSING_FCLOSE_DECL
-dnl
-dnl See if we have broken header files like SunOS has.
-dnl
-AC_DEFUN([PHP_MISSING_FCLOSE_DECL],[
-  AC_MSG_CHECKING([for fclose declaration])
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[int (*func)() = fclose]])],[
-    AC_DEFINE(MISSING_FCLOSE_DECL,0,[ ])
-    AC_MSG_RESULT([ok])
-  ],[
-    AC_DEFINE(MISSING_FCLOSE_DECL,1,[ ])
-    AC_MSG_RESULT([missing])
-  ])
-])
-
 dnl
 dnl PHP_SOCKADDR_CHECKS
 dnl
diff --git a/configure.ac b/configure.ac
index 0ce4e7042b7a6..410c0168906b5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -464,7 +464,6 @@ dnl ----------------------------------------------------------------------------
 AC_STRUCT_TIMEZONE
 
 PHP_MISSING_TIME_R_DECL
-PHP_MISSING_FCLOSE_DECL
 PHP_STRUCT_FLOCK
 
 AC_CHECK_TYPES(socklen_t, [], [], [
diff --git a/ext/standard/file.c b/ext/standard/file.c
index f0ddc2e30f662..f1842941f234b 100644
--- a/ext/standard/file.c
+++ b/ext/standard/file.c
@@ -86,10 +86,6 @@
 # include <sys/file.h>
 #endif
 
-#if MISSING_FCLOSE_DECL
-extern int fclose(FILE *);
-#endif
-
 #ifdef HAVE_SYS_MMAN_H
 # include <sys/mman.h>
 #endif