diff --git a/lib/router/index.js b/lib/router/index.js
index 1f426068d7..51db4c28ff 100644
--- a/lib/router/index.js
+++ b/lib/router/index.js
@@ -626,7 +626,7 @@ function restore(fn, obj) {
     vals[i] = obj[props[i]];
   }
 
-  return function(err){
+  return function () {
     // restore vals
     for (var i = 0; i < props.length; i++) {
       obj[props[i]] = vals[i];