diff --git a/core/core.services.yml b/core/core.services.yml
index e6094bd..4cad313 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -164,7 +164,7 @@ services:
     class: Drupal\Core\Theme\ThemeNegotiator
     arguments: ['@access_check.theme']
     calls:
-      - [setRequest, ['@request=']]
+      - [setRequest, ['@request']]
   theme.negotiator.default:
     class: Drupal\Core\Theme\DefaultNegotiator
     arguments: ['@config.factory']