diff --git a/core/lib/Drupal/Core/Menu/menu.api.php b/core/lib/Drupal/Core/Menu/menu.api.php
index 65290ff..a2b8475 100644
--- a/core/lib/Drupal/Core/Menu/menu.api.php
+++ b/core/lib/Drupal/Core/Menu/menu.api.php
@@ -533,7 +533,7 @@ function hook_contextual_links_plugins_alter(array &$contextual_links) {
 /**
  * Perform alterations to the breadcrumb built by the BreadcrumbManager.
  *
- * @param \Drupal\Core\Breadcrumb\Breadcrumb $breadcrumb
+ * @param \Drupal\Core\Breadcrumb\BreadcrumbInterface $breadcrumb
  *   A breadcrumb object returned by the breadcrumb manager build method.
  * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
  *   The current route match.
@@ -545,7 +545,7 @@ function hook_contextual_links_plugins_alter(array &$contextual_links) {
  *
  * @ingroup menu
  */
-function hook_system_breadcrumb_alter(Drupal\Core\Breadcrumb\Breadcrumb &$breadcrumb, \Drupal\Core\Routing\RouteMatchInterface $route_match, array $context) {
+function hook_system_breadcrumb_alter(Drupal\Core\Breadcrumb\BreadcrumbInterface &$breadcrumb, \Drupal\Core\Routing\RouteMatchInterface $route_match, array $context) {
   // Add an item to the end of the breadcrumb.
   $breadcrumb->addLink(Drupal::l(t('Text'), 'example_route_name'));
 }