diff --git a/config/application.rb b/config/application.rb
index 83124cfdac..929a44948f 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -93,6 +93,7 @@ module Mastodon
       :fa,
       :fi,
       :fr,
+      :fy,
       :ga,
       :gd,
       :gl,