diff --git a/reactos/base/applications/charmap/precomp.h b/reactos/base/applications/charmap/precomp.h
index aa640328fc9..dc1b8635b23 100644
--- a/reactos/base/applications/charmap/precomp.h
+++ b/reactos/base/applications/charmap/precomp.h
@@ -1,7 +1,12 @@
 #ifndef __CHARMAP_PRECOMP_H
 #define __CHARMAP_PRECOMP_H
 
-#include <windows.h>
+#include <stdarg.h>
+#include <windef.h>
+#include <winbase.h>
+#include <winuser.h>
+#include <wingdi.h>
+
 
 #include "resource.h"