diff --git a/app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/Save.php b/app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/Save.php
index 1a398d98af594..63ff4abb4b391 100644
--- a/app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/Save.php
+++ b/app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/Save.php
@@ -25,7 +25,7 @@ class Save extends \Magento\SalesRule\Controller\Adminhtml\Promo\Quote implement
     /**
      * @var DataPersistorInterface
      */
-    protected $dataPersistor;
+    private $dataPersistor;
 
     /**
      * @param \Magento\Backend\App\Action\Context $context