diff --git a/core/lib/Drupal/Core/Menu/MenuLinkTree.php b/core/lib/Drupal/Core/Menu/MenuLinkTree.php
index 8dd4c51c90cad1f313763105a6d53a87ff0dfc1b..8a6dce8ffcfc43169245af7ab3e455b148d83de8 100644
--- a/core/lib/Drupal/Core/Menu/MenuLinkTree.php
+++ b/core/lib/Drupal/Core/Menu/MenuLinkTree.php
@@ -21,6 +21,13 @@ class MenuLinkTree implements MenuLinkTreeInterface {
    */
   protected $treeStorage;
 
+  /**
+   * The menu link plugin manager.
+   *
+   * @var \Drupal\Core\Menu\MenuLinkManagerInterface
+   */
+  protected $menuLinkManager;
+
   /**
    * The route provider to load routes by name.
    *