diff --git a/include/wingdi.h b/include/wingdi.h
index e10bbe9ad43..12e28dc309f 100644
--- a/include/wingdi.h
+++ b/include/wingdi.h
@@ -3331,6 +3331,8 @@ typedef struct tagGLYPHSET {
   WCRANGE  ranges[1];
 } GLYPHSET, *PGLYPHSET, *LPGLYPHSET;
 
+#define GS_8BIT_INDICES 0x00000001
+
 WINGDIAPI INT         WINAPI AbortDoc(HDC);
 WINGDIAPI BOOL        WINAPI AbortPath(HDC);
 WINGDIAPI INT         WINAPI AddFontResourceA(LPCSTR);