diff --git a/lib/storage-handler.js b/lib/storage-handler.js
index ecaf809..ff7e0b4 100644
--- a/lib/storage-handler.js
+++ b/lib/storage-handler.js
@@ -25,7 +25,7 @@ exports.upload = function (provider, req, res, options, cb) {
   }
 
   var form = new IncomingForm(options);
-  container = options.container || req.params.container;
+  var container = options.container || req.params.container;
   var fields = {}, files = {};
   form.handlePart = function (part) {
     var self = this;