diff --git a/reactos/drivers/video/displays/vga/vgaddi.h b/reactos/drivers/video/displays/vga/vgaddi.h
index d811e3e8e2c..f36acc8016a 100644
--- a/reactos/drivers/video/displays/vga/vgaddi.h
+++ b/reactos/drivers/video/displays/vga/vgaddi.h
@@ -2,6 +2,8 @@
 #include <ddk/winddi.h>
 #include <ddk/ntddvdeo.h>
 
+#define TAG(A, B, C, D) (ULONG)(((A)<<0) + ((B)<<8) + ((C)<<16) + ((D)<<24))
+
 #define DS_SOLIDBRUSH  0x00000001
 #define DS_GREYBRUSH   0x00000002
 #define DS_BRUSH       0x00000004