diff --git a/core/modules/block/custom_block/custom_block.routing.yml b/core/modules/block/custom_block/custom_block.routing.yml
index e5932ac..622d08d 100644
--- a/core/modules/block/custom_block/custom_block.routing.yml
+++ b/core/modules/block/custom_block/custom_block.routing.yml
@@ -17,7 +17,7 @@ custom_block.add_form:
   path: '/block/add/{custom_block_type}'
   defaults:
     _content: 'Drupal\custom_block\Controller\CustomBlockController::addForm'
-    _title_callback: 'Drupal\custom_block\Controller\CustomBlockController::getFormTitle'
+    _title_callback: 'Drupal\custom_block\Controller\CustomBlockController::getAddFormTitle'
   requirements:
     _permission: 'administer blocks'
 
diff --git a/core/modules/block/custom_block/lib/Drupal/custom_block/Controller/CustomBlockController.php b/core/modules/block/custom_block/lib/Drupal/custom_block/Controller/CustomBlockController.php
index 81a66e9..6469baf 100644
--- a/core/modules/block/custom_block/lib/Drupal/custom_block/Controller/CustomBlockController.php
+++ b/core/modules/block/custom_block/lib/Drupal/custom_block/Controller/CustomBlockController.php
@@ -120,7 +120,7 @@ public function addForm(CustomBlockTypeInterface $custom_block_type, Request $re
    * @return string
    *   The page title.
    */
-  public function getFormTitle(CustomBlockTypeInterface $custom_block_type) {
+  public function getAddFormTitle(CustomBlockTypeInterface $custom_block_type) {
     return $this->t('Add %type custom block', array('%type' => $custom_block_type->label()));
   }