diff -r 970454df99cd PC/pyconfig.h
--- a/PC/pyconfig.h	Thu May 14 14:14:18 2015 -0400
+++ b/PC/pyconfig.h	Fri May 15 00:02:17 2015 +0200
@@ -145,11 +145,11 @@
 #if defined(_M_IA64)
 #define COMPILER _Py_PASTE_VERSION("64 bit (Itanium)")
 #define MS_WINI64
-#define PYD_PLATFORM_TAG "win_ia64"
+#define PYD_PLATFORM_TAG "ia64-win"
 #elif defined(_M_X64) || defined(_M_AMD64)
 #define COMPILER _Py_PASTE_VERSION("64 bit (AMD64)")
 #define MS_WINX64
-#define PYD_PLATFORM_TAG "win_amd64"
+#define PYD_PLATFORM_TAG "x86_64-win"
 #else
 #define COMPILER _Py_PASTE_VERSION("64 bit (Unknown)")
 #endif
@@ -195,10 +195,10 @@
 #if defined(MS_WIN32) && !defined(MS_WIN64)
 #if defined(_M_IX86)
 #define COMPILER _Py_PASTE_VERSION("32 bit (Intel)")
-#define PYD_PLATFORM_TAG "win32"
+#define PYD_PLATFORM_TAG "i386-win"
 #elif defined(_M_ARM)
 #define COMPILER _Py_PASTE_VERSION("32 bit (ARM)")
-#define PYD_PLATFORM_TAG "win_arm"
+#define PYD_PLATFORM_TAG "arm-win"
 #else
 #define COMPILER _Py_PASTE_VERSION("32 bit (Unknown)")
 #endif