diff --git a/core/modules/system/lib/Drupal/system/Plugin/Block/SystemBreadcrumbBlock.php b/core/modules/system/lib/Drupal/system/Plugin/Block/SystemBreadcrumbBlock.php
index b678eb6..cb0b908 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/Block/SystemBreadcrumbBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/Block/SystemBreadcrumbBlock.php
@@ -25,7 +25,7 @@ class SystemBreadcrumbBlock extends BlockBase {
   /**
    * {@inheritdoc}
    */
-  protected function blockBuild() {
+  public function build() {
     $breadcrumb_manager = \Drupal::service('breadcrumb');
     $request = \Drupal::service('request');
     $breadcrumb = $breadcrumb_manager->build($request->attributes->all());