diff --git a/components/dropdown/index.jsx b/components/dropdown/index.jsx
index 4d02998474..201f5ff5cf 100644
--- a/components/dropdown/index.jsx
+++ b/components/dropdown/index.jsx
@@ -3,16 +3,18 @@
 var React = require('react');
 var Dropdown = require('rc-dropdown');
 
-module.exports = React.createClass({
-  getDefaultProps: function() {
+var AntDropdown = React.createClass({
+  getDefaultProps: function () {
     return {
       transitionName: 'slide-up',
       prefixCls: 'ant-dropdown'
     };
   },
-  render: function() {
+  render: function () {
     return (
       <Dropdown {...this.props} />
     );
   }
 });
+
+module.exports = AntDropdown;