diff --git a/railties/lib/rails/generators/rails/app/templates/config.ru b/railties/lib/rails/generators/rails/app/templates/config.ru
index bd83b25412305f93fdb0a892aded30e5178899ba..9797be5aedf4acdf3ccc79517e687024682d566a 100644
--- a/railties/lib/rails/generators/rails/app/templates/config.ru
+++ b/railties/lib/rails/generators/rails/app/templates/config.ru
@@ -1,4 +1,4 @@
 # This file is used by Rack-based servers to start the application.
 
-require ::File.expand_path('../config/environment', __FILE__)
+require ::File.expand_path('config/environment', __dir__)
 run Rails.application