diff --git a/server/wsproxy/downstream.h b/server/wsproxy/downstream.h
index 8f7b9ad..d5be9e1 100644
--- a/server/wsproxy/downstream.h
+++ b/server/wsproxy/downstream.h
@@ -8,4 +8,7 @@ class DownStream
     std::weak_ptr<UpStream> conn;
 
     void ForwardUpStreamMsg(f8::MsgHdr& hdr);
+
+private:
+    int type_ = 0;
 };