diff --git a/include/wingdi.h b/include/wingdi.h
index 858d3c1ba8f..bff96f4b3db 100644
--- a/include/wingdi.h
+++ b/include/wingdi.h
@@ -3033,6 +3033,10 @@ DECL_WINELIB_TYPE_AW(LPDEVMODE)
 #define DM_PANNINGWIDTH         __MSABI_LONG(0x08000000)
 #define DM_PANNINGHEIGHT        __MSABI_LONG(0x10000000)
 
+#define DM_GRAYSCALE            1
+#define DM_INTERLACED           2
+#define DMDISPLAYFLAGS_TEXTMODE 4
+
 #define DMORIENT_PORTRAIT	1
 #define DMORIENT_LANDSCAPE	2