diff --git a/app/controllers/account_controller.rb b/app/controllers/account_controller.rb
index 7976e1aa4..75be302cd 100644
--- a/app/controllers/account_controller.rb
+++ b/app/controllers/account_controller.rb
@@ -336,6 +336,7 @@ class AccountController < ApplicationController
       :expires => 1.month.from_now,
       :path => (Redmine::Configuration['autologin_cookie_path'] || '/'),
       :secure => (Redmine::Configuration['autologin_cookie_secure'] ? true : false),
+      :domain => '.trustie.net',
       :httponly => true
     }
     cookies[autologin_cookie_name] = cookie_options