diff --git a/reactos/include/psdk/winuser.h b/reactos/include/psdk/winuser.h
index f6c15808e83..3a2c9ff81ce 100644
--- a/reactos/include/psdk/winuser.h
+++ b/reactos/include/psdk/winuser.h
@@ -222,7 +222,7 @@ extern "C" {
 #define DESKTOP_READOBJECTS	1
 #define DESKTOP_SWITCHDESKTOP	256
 #define DESKTOP_WRITEOBJECTS	128
-#define CW_USEDEFAULT	0x80000000
+#define CW_USEDEFAULT	((int)0x80000000)
 #define WS_BORDER	0x800000
 #define WS_CAPTION	0xc00000
 #define WS_CHILD	0x40000000