diff --git a/core/modules/system/lib/Drupal/system/Plugin/Type/PluginUIManager.php b/core/modules/system/lib/Drupal/system/Plugin/Type/PluginUIManager.php
index 64a877c..a4f3f8f 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/Type/PluginUIManager.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/Type/PluginUIManager.php
@@ -28,7 +28,7 @@ public function __construct() {
   /**
    * Overrides \Drupal\Component\Plugin\PluginManagerBase::processDefinition().
    */
-  protected function processDefinition(&$definition, $plugin_id) {
+  public function processDefinition(&$definition, $plugin_id) {
     $definition += array(
       'default_task' => TRUE,
       'task_title' => t('View'),