diff --git a/server/wsproxy/app.cc b/server/wsproxy/app.cc
index 4e01d48..8ee7081 100644
--- a/server/wsproxy/app.cc
+++ b/server/wsproxy/app.cc
@@ -604,7 +604,7 @@ void App::DispatchUdpMsg()
     }//end while
 
     if (!udp_work_node_) {
-        working_msgnode_size_ = 0;
+        udp_working_msgnode_size_ = 0;
     }
 }