diff --git a/app/controllers/account_controller.rb b/app/controllers/account_controller.rb
index 26121ce..3c31895 100644
--- a/app/controllers/account_controller.rb
+++ b/app/controllers/account_controller.rb
@@ -272,7 +272,7 @@ class AccountController < ApplicationController
     cookie_options = {
       :value => token.value,
       :expires => 1.year.from_now,
-      :path => (Redmine::Configuration['autologin_cookie_path'] || '/'),
+      :path => (Redmine::Configuration['autologin_cookie_path'] || RedmineApp::Application.config.relative_url_root || '/'),
       :secure => secure,
       :httponly => true
     }
diff --git a/config/application.rb b/config/application.rb
index d062d60..96fa38b 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -72,7 +72,9 @@ module RedmineApp
     # can change it (environments/ENV.rb would take precedence over it)
     config.log_level = Rails.env.production? ? :info : :debug
 
-    config.session_store :cookie_store, :key => '_redmine_session'
+    config.session_store :cookie_store,
+      :key => '_redmine_session',
+      :path => config.relative_url_root || '/'
 
     if File.exists?(File.join(File.dirname(__FILE__), 'additional_environment.rb'))
       instance_eval File.read(File.join(File.dirname(__FILE__), 'additional_environment.rb'))
-- 
2.6.2