diff --git a/app/helpers/settings_helper.rb b/app/helpers/settings_helper.rb
index 39eb4180e..10aaf3aca 100644
--- a/app/helpers/settings_helper.rb
+++ b/app/helpers/settings_helper.rb
@@ -32,6 +32,7 @@ module SettingsHelper
     hy: 'Հայերեն',
     id: 'Bahasa Indonesia',
     io: 'Ido',
+    is: 'Íslenska',
     it: 'Italiano',
     ja: '日本語',
     ka: 'ქართული',
diff --git a/config/application.rb b/config/application.rb
index 58e59fd51..c1bc18a30 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -70,6 +70,7 @@ module Mastodon
       :hy,
       :id,
       :io,
+      :is,
       :it,
       :ja,
       :ka,