diff --git a/src/cmd/gc/go.h b/src/cmd/gc/go.h
index c4153ee424..0946b680b1 100644
--- a/src/cmd/gc/go.h
+++ b/src/cmd/gc/go.h
@@ -297,6 +297,7 @@ enum
 	Wlitint,
 	Wlitbool,
 	Wlitstr,
+	Wlitnil,
 
 	Wtunkn,
 };