diff --git a/src/OpenyRepeatRepository.php b/src/OpenyRepeatRepository.php
index ebd18e32..cd8c3ef2 100644
--- a/src/OpenyRepeatRepository.php
+++ b/src/OpenyRepeatRepository.php
@@ -39,6 +39,11 @@ class OpenyRepeatRepository implements OpenyRepeatRepositoryInterface {
    */
   protected $nodeStorage;
 
+  /**
+   * @var \Drupal\Core\Cache\MemoryCache\MemoryCacheInterface
+   */
+  protected $memoryCache;
+
   /**
    * Constructs a OpenyRepeatRepository object.
    *