diff --git a/constant.go b/constant.go
index cc9af9a..15ba654 100644
--- a/constant.go
+++ b/constant.go
@@ -3,3 +3,7 @@ package f5
 const (
 	IM_HTTP_CLI_MGR_RESPONSE = 1
 )
+
+const (
+	WSP_SS_MAX_MSGID = 100
+)