--- harfbuzz-0.9.9/src/hb-uniscribe.h.orig	2012-12-24 14:28:27.539246473 +0100
+++ harfbuzz-0.9.9/src/hb-uniscribe.h	2012-12-24 14:28:49.002338096 +0100
@@ -29,7 +29,7 @@
 
 #include "hb.h"
 
-#ifndef _WIN32_WINNT
+#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600
 #define _WIN32_WINNT 0x0600
 #endif
 #include <windows.h>