diff --git a/core/core.services.yml b/core/core.services.yml
index e1f029c0cb..c52dab33ee 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -1456,7 +1456,7 @@ services:
     class: Drupal\Core\Authentication\Anon
     arguments: []
     tags:
-      - { name: authentication_provider, provider_id: 'anon', priority: 0, global: TRUE }
+      - { name: authentication_provider, provider_id: 'anon', priority: -100, global: TRUE }
   authentication_subscriber:
     class: Drupal\Core\EventSubscriber\AuthenticationSubscriber
     arguments: ['@authentication', '@current_user']