core/lib/Drupal/Core/Menu/MenuTreeStorage.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/lib/Drupal/Core/Menu/MenuTreeStorage.php b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
index 941ac41..b159e6f 100644
--- a/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
+++ b/core/lib/Drupal/Core/Menu/MenuTreeStorage.php
@@ -180,7 +180,7 @@ public function rebuild(array $definitions) {
     $this->resetDefinitions();
     $affected_menus = $this->getMenuNames() + $before_menus;
     // Invalidate any cache tagged with any menu name.
-    $cache_tags = Cache::buildTags('config:system.menu.', $affected_menus, '');
+    $cache_tags = Cache::buildTags('config:system.menu', $affected_menus, '.');
     Cache::invalidateTags($cache_tags);
     $this->resetDefinitions();
     // Every item in the cache bin should have one of the menu cache tags but it