diff -u b/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php b/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php
--- b/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php
+++ b/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php
@@ -6,6 +6,7 @@
  */
 
 namespace Drupal\Core\Entity;
+use Drupal\Core\Entity\Query\QueryInterface;
 
 /**
  * A base entity storage controller class.