diff --git a/reactos/win32ss/gdi/ntgdi/gdiobj.c b/reactos/win32ss/gdi/ntgdi/gdiobj.c
index 6b82c340486..5f7b41e704d 100644
--- a/reactos/win32ss/gdi/ntgdi/gdiobj.c
+++ b/reactos/win32ss/gdi/ntgdi/gdiobj.c
@@ -66,7 +66,7 @@
 #define InterlockedOr16 _InterlockedOr16
 #endif
 
-#define GDIOBJ_POOL_TAG(type) ('00hG' + ((objt & 0x1f) << 24))
+#define GDIOBJ_POOL_TAG(type) ('00hG' + (((type) & 0x1f) << 24))
 
 enum
 {