diff --git a/server/wheelserver/constant/constant.go b/server/wheelserver/constant/constant.go
index fcc497a4..d588fc46 100644
--- a/server/wheelserver/constant/constant.go
+++ b/server/wheelserver/constant/constant.go
@@ -20,3 +20,7 @@ const (
 const (
 	SESSION_KEY = "session"
 )
+
+const (
+	MSG_LOGIN = iota
+)