diff --git a/src/Routing/AuthProviderRoutes.php b/src/Routing/AuthProviderRoutes.php
index ddaf232..1bc2495 100644
--- a/src/Routing/AuthProviderRoutes.php
+++ b/src/Routing/AuthProviderRoutes.php
@@ -12,6 +12,13 @@
  */
 class AuthProviderRoutes implements ContainerInjectionInterface {
 
+  /**
+   * The AuthProviderManager.
+   *
+   * @var \Drupal\Component\Plugin\PluginManagerInterface
+   */
+  protected $authProviderManager;
+
   /**
    * Constructs a new AuthProvider route subscriber.
    *