diff --git a/include/gdi.h b/include/gdi.h
index 64505ce1..12a80874 100644
--- a/include/gdi.h
+++ b/include/gdi.h
@@ -9592,10 +9592,10 @@ MG_EXPORT int GUIAPI GetGlyphsByRules(LOGFONT* logfont,
 
 #define GRF_HANGING_PUNC_MASK           0x00000F00
 #define GRF_HANGING_PUNC_NONE           0x00000000
-#define GRF_HANGING_PUNC_FIRST          0x00000100
-#define GRF_HANGING_PUNC_FORCE_END      0x00000200
-#define GRF_HANGING_PUNC_ALLOW_END      0x00000300
-#define GRF_HANGING_PUNC_LAST           0x00000400
+#define GRF_HANGING_PUNC_FORCE_END      0x00000100
+#define GRF_HANGING_PUNC_ALLOW_END      0x00000200
+#define GRF_HANGING_PUNC_FIRST          0x00000400 // flag bit
+#define GRF_HANGING_PUNC_LAST           0x00000800 // flag bit
 
 #define GRF_DIRECTION_MASK              0x00003000
 #define GRF_DIRECTION_LTR               0x00000000