diff --git a/Modules/overlapped.c b/Modules/overlapped.c
index 8e6d397e227..f85e5bc7364 100644
--- a/Modules/overlapped.c
+++ b/Modules/overlapped.c
@@ -23,6 +23,12 @@
 #  define T_POINTER T_ULONGLONG
 #endif
 
+/* Compatibility with Python 3.3 */
+#if PY_VERSION_HEX < 0x03040000
+#    define PyMem_RawMalloc PyMem_Malloc
+#    define PyMem_RawFree PyMem_Free
+#endif
+
 #define F_HANDLE F_POINTER
 #define F_ULONG_PTR F_POINTER
 #define F_DWORD "k"