diff --git a/config/application.rb b/config/application.rb
index d062d60..36a67ca 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.nil?) ? '/' : 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