diff --git a/core/modules/block/lib/Drupal/block/BlockRenderController.php b/core/modules/block/lib/Drupal/block/BlockRenderController.php
index ae314a0..7370f3e 100644
--- a/core/modules/block/lib/Drupal/block/BlockRenderController.php
+++ b/core/modules/block/lib/Drupal/block/BlockRenderController.php
@@ -18,7 +18,7 @@ class BlockRenderController implements EntityRenderControllerInterface {
   /**
    * Implements \Drupal\Core\Entity\EntityRenderControllerInterface::buildContent().
    */
-  public function buildContent(array $entities = array(), $view_mode = 'full', $langcode = NULL) {
+  public function buildContent(array $entities, array $displays, $view_mode, $langcode = NULL) {
     return array();
   }