--- src/lcms2_internal.h.mingw	2014-03-06 12:12:07.654380274 +0100
+++ src/lcms2_internal.h	2014-03-06 12:12:19.590079255 +0100
@@ -174,7 +174,7 @@
 #ifdef CMS_IS_WINDOWS_
 
 #define WIN32_LEAN_AND_MEAN 1
-#include <Windows.h>
+#include <windows.h>
 
 
 // From: http://locklessinc.com/articles/pthreads_on_windows/