diff --git a/framework/rbac/migrations/m140506_102106_rbac_init.php b/framework/rbac/migrations/m140506_102106_rbac_init.php
index cc92edc97a..ee6f9ebe39 100644
--- a/framework/rbac/migrations/m140506_102106_rbac_init.php
+++ b/framework/rbac/migrations/m140506_102106_rbac_init.php
@@ -6,7 +6,6 @@
  */
 
 use yii\base\InvalidConfigException;
-use yii\db\Schema;
 use yii\rbac\DbManager;
 
 /**