diff --git a/app/controllers/locales_controller.rb b/app/controllers/locales_controller.rb
index bf2295dd..6cd54300 100644
--- a/app/controllers/locales_controller.rb
+++ b/app/controllers/locales_controller.rb
@@ -1,6 +1,6 @@
 class LocalesController < ApplicationController
   def choose
-    cookies[:locale] = params[:locale] if valid_locale?(params[:locale])
+    cookies.permanent[:locale] = params[:locale] if valid_locale?(params[:locale])
     origin = params[:return_to] || :back
     redirect_to origin
   end