diff --git a/core/core.services.yml b/core/core.services.yml
index 28eee86..e54d56a 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -700,7 +700,7 @@ services:
     arguments: ['@request_stack', '@url_generator']
   unrouted_url_assembler:
     class: Drupal\Core\Utility\UnroutedUrlAssembler
-    arguments: ['@request_stack', '@config.factory', '@path_processor_manager', '%filter_protocols%]
+    arguments: ['@request_stack', '@config.factory', '@path_processor_manager', '%filter_protocols%']
   link_generator:
     class: Drupal\Core\Utility\LinkGenerator
     arguments: ['@url_generator', '@module_handler', '@renderer']