diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index ecb6f1a038b..c21d5997796 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -3358,7 +3358,7 @@ os_init(void)
 	ret = WSAStartup(0x0101, &WSAData);
 	switch (ret) {
 	case 0:	/* No error */
-		atexit(os_cleanup);
+		Py_AtExit(os_cleanup);
 		return 1; /* Success */
 	case WSASYSNOTREADY:
 		PyErr_SetString(PyExc_ImportError,