--- pyconfig.h	2016-01-27 10:54:56.000000000 +0300
+++ pyconfig.h.3.5.mingw	2016-03-28 11:46:48.000000000 +0300
@@ -100,6 +100,12 @@
 
 /* Compiler specific defines */
 
+#ifdef __MINGW32__
+#ifdef _WIN64
+#define MS_WIN64
+#endif
+#endif
+
 /* ------------------------------------------------------------------------*/
 /* Microsoft C defines _MSC_VER */
 #ifdef _MSC_VER