diff --git a/app/javascript/mastodon/initial_state.js b/app/javascript/mastodon/initial_state.js
index b0a7cfa6456..d43e6da66cd 100644
--- a/app/javascript/mastodon/initial_state.js
+++ b/app/javascript/mastodon/initial_state.js
@@ -43,6 +43,7 @@
  * @property {boolean=} use_pending_items
  * @property {string} version
  * @property {string} sso_redirect
+ * @property {string[]} spoken_languages
  */
 
 /**