diff --git a/reactos/lib/user32/misc/dllmain.c b/reactos/lib/user32/misc/dllmain.c
index 439bf8ea177..b636958f70a 100644
--- a/reactos/lib/user32/misc/dllmain.c
+++ b/reactos/lib/user32/misc/dllmain.c
@@ -9,6 +9,7 @@
 #define _WIN32K_KAPI_H
 #include <user32.h>
 #include <strpool.h>
+#include <roscfg.h>
 
 #ifdef DBG