include: Some DirectX headers are supposed to define COM_NO_WINDOWS_H.
diff --git a/include/dinput.h b/include/dinput.h
index f6e766b..e8c5658 100644
--- a/include/dinput.h
+++ b/include/dinput.h
@@ -19,6 +19,7 @@
 #ifndef __WINE_DINPUT_H
 #define __WINE_DINPUT_H
 
+#define COM_NO_WINDOWS_H
 #include <objbase.h>
 
 #ifndef DIRECTINPUT_VERSION