diff --git a/config/site_settings.yml b/config/site_settings.yml
index 00c23780c38..80b326cde67 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -651,8 +651,12 @@ posting:
     default: false
   notify_about_queued_posts_after:
     default: 24
-  auto_close_messages_post_count: 500
-  auto_close_topics_post_count: 10000
+  auto_close_messages_post_count:
+    default: 500
+    shadowed_by_global: true
+  auto_close_topics_post_count:
+    default: 10000
+    shadowed_by_global: true
   code_formatting_style:
     client: true
     type: enum