diff --git a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php
index ef57f4f..a62d286 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php
@@ -33,6 +33,13 @@ class ViewsExposedFilterBlock implements ContainerDerivativeInterface {
   protected $viewStorageController;
 
   /**
+   * The base plugin ID that the derivative is for.
+   *
+   * @var string
+   */
+  protected $basePluginId;
+
+  /**
    * Constructs a ViewsExposedFilterBlock object.
    *
    * @param string $base_plugin_id