diff --git a/core/modules/system/src/Controller/DbUpdateController.php b/core/modules/system/src/Controller/DbUpdateController.php
index 6c177a2..5d6b59a 100644
--- a/core/modules/system/src/Controller/DbUpdateController.php
+++ b/core/modules/system/src/Controller/DbUpdateController.php
@@ -366,6 +366,7 @@ protected function selection(Request $request) {
       else {
         $build['start']['#title'] = $this->formatPlural($count, '1 pending update', '@count pending updates');
       }
+      // @todo Simplify with https://www.drupal.org/node/2548095
       $base_url = str_replace('/update.php', '', $request->getBaseUrl());
       $url = (new Url('system.db_update', array('op' => 'run')))->setOption('base_url', $base_url);
       $build['link'] = array(
@@ -390,6 +391,7 @@ protected function selection(Request $request) {
    *   A render array.
    */
   protected function results(Request $request) {
+    // @todo Simplify with https://www.drupal.org/node/2548095
     $base_url = str_replace('/update.php', '', $request->getBaseUrl());
 
     // Report end result.
@@ -655,6 +657,7 @@ public static function batchFinished($success, $results, $operations) {
    *   An array of links.
    */
   protected function helpfulLinks(Request $request) {
+    // @todo Simplify with https://www.drupal.org/node/2548095
     $base_url = str_replace('/update.php', '', $request->getBaseUrl());
     $links['front'] = array(
       'title' => $this->t('Front page'),