diff --git a/config/site_settings.yml b/config/site_settings.yml
index d513c6b616b..a690f16c4cb 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -1074,6 +1074,7 @@ files:
   enable_s3_uploads:
     default: false
     client: true
+    shadowed_by_global: true
   s3_use_iam_profile: false
   s3_access_key_id:
     default: ""
@@ -1090,6 +1091,7 @@ files:
   s3_upload_bucket:
     default: ""
     regex: '^[a-z0-9\-\/_]+$' # can't use '.' when using HTTPS
+    shadowed_by_global: true
   s3_endpoint:
     default: ""
     regex: '^https?:\/\/.+[^\/]$'