diff --git a/Observer/CacheTagsClean.php b/Observer/CacheTagsClean.php
index e09d1f7..0ea1796 100644
--- a/Observer/CacheTagsClean.php
+++ b/Observer/CacheTagsClean.php
@@ -39,6 +39,11 @@ class CacheTagsClean implements ObserverInterface
      */
     private $tagResolver;
 
+    /**
+     * @var Registry
+     */
+    private $registry;
+    
     /**
      * @var Helper
      */