diff --git a/extensions/lang-english/locale/flarum-pusher.yml b/extensions/lang-english/locale/flarum-pusher.yml
index ae2686411..184489bc2 100644
--- a/extensions/lang-english/locale/flarum-pusher.yml
+++ b/extensions/lang-english/locale/flarum-pusher.yml
@@ -9,6 +9,7 @@ flarum-pusher:
 
     # These translations are used in the Pusher Settings modal dialog.
     pusher_settings:
+      app_cluster_label: Cluster
       app_id_label: App ID
       app_key_label: App Key
       app_secret_label: App Secret