diff --git a/src/components/menu/menu-item.vue b/src/components/menu/menu-item.vue
index f7beb5fc..23e2b969 100644
--- a/src/components/menu/menu-item.vue
+++ b/src/components/menu/menu-item.vue
@@ -5,10 +5,11 @@
 <script>
     import Emitter from '../../mixins/emitter';
     import { findComponentUpward } from '../../utils/assist';
-    const prefixCls = 'ivu-menu';
     import mixin from './mixin';
     import mixinsLink from '../../mixins/link';
 
+    const prefixCls = 'ivu-menu';
+
     export default {
         name: 'MenuItem',
         mixins: [ Emitter, mixin, mixinsLink ],