diff --git a/app/assets/javascripts/discourse/controllers/discovery_topics_controller.js b/app/assets/javascripts/discourse/controllers/discovery_topics_controller.js
index 1e92118419b..7cd2577ca3d 100644
--- a/app/assets/javascripts/discourse/controllers/discovery_topics_controller.js
+++ b/app/assets/javascripts/discourse/controllers/discovery_topics_controller.js
@@ -47,7 +47,7 @@ Discourse.DiscoveryTopicsController = Discourse.DiscoveryController.extend({
       var self = this,
           selected = this.get('selected'),
           operation = { type: 'change_notification_level',
-                        notification_level: Discourse.Topic.NotificationLevel.REGULAR };
+                        notification_level_id: Discourse.Topic.NotificationLevel.REGULAR };
 
       var promise;
       if (selected.length > 0) {