diff --git a/core/lib/Drupal/Core/Cache/CacheFactory.php b/core/lib/Drupal/Core/Cache/CacheFactory.php
index 2697964..b756e91 100644
--- a/core/lib/Drupal/Core/Cache/CacheFactory.php
+++ b/core/lib/Drupal/Core/Cache/CacheFactory.php
@@ -14,7 +14,7 @@
 use Symfony\Component\DependencyInjection\ContainerAware;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class CacheFactory extends ContainerAware {
+class CacheFactory extends ContainerAware implements CacheFactoryInterface {
 
   /**
    * The settings array.