diff --git a/lib/application.js b/lib/application.js
index 5e03a12..05ac594 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -72,8 +72,8 @@ app.session = function appEasySession(_opts) {
   }
 
   var self = this;
-  namespace.forEach(function eachNamespaceUseMiddleware() {
-    self.io.of(namespace).use(session);
+  namespace.forEach(function eachNamespaceUseMiddleware(ns) {
+    self.io.of(ns).use(session);
   });
 };