diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index fb435e3..e73805f 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -6910,7 +6910,7 @@
        tested against in gzip.GzipFile.__init__() - see issue #13781. */
     f = PyFile_FromFile(NULL, "<fdopen>", orgmode, fclose);
     if (f == NULL) {
-        PyMEM_FREE(mode);
+        PyMem_FREE(mode);
         return NULL;
     }
     Py_BEGIN_ALLOW_THREADS