diff --git a/config/initializers/004-message_bus.rb b/config/initializers/004-message_bus.rb
index 5e28ebaa513..5faf89f9e8b 100644
--- a/config/initializers/004-message_bus.rb
+++ b/config/initializers/004-message_bus.rb
@@ -27,7 +27,7 @@ def setup_message_bus_env(env)
         {
           "Access-Control-Allow-Origin" => Discourse.base_url_no_prefix,
           "Access-Control-Allow-Methods" => "GET, POST",
-          "Access-Control-Allow-Headers" => "X-SILENCE-LOGGER, X-Shared-Session-Key, Dont-Chunk"
+          "Access-Control-Allow-Headers" => "X-SILENCE-LOGGER, X-Shared-Session-Key, Dont-Chunk, Discourse-Visible"
         },
       user_id: user_id,
       group_ids: group_ids,