diff --git a/lib/application.js b/lib/application.js
index e59b8a3..8af42bc 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -125,7 +125,9 @@ app.callback = function(){
   return function(req, res){
     var ctx = new self.Context(self, req, res);
 
-    ctx.socket.on('error', onerror);
+    if (!~ctx.socket.listeners('error').indexOf(onerror)) {
+      ctx.socket.on('error', onerror);
+    }
 
     function done(err) {
       if (err) ctx.onerror(err);