diff --git a/lib/config/integrations/rails/railtie.rb b/lib/config/integrations/rails/railtie.rb
index 460fa5f3..a758e060 100644
--- a/lib/config/integrations/rails/railtie.rb
+++ b/lib/config/integrations/rails/railtie.rb
@@ -7,6 +7,8 @@ def preload
           initializer = ::Rails.root.join('config', 'initializers', 'config.rb')
           require initializer if File.exist?(initializer)
 
+          return if Object.const_defined?(Config.const_name)
+
           # Parse the settings before any of the initializers
           Config.load_and_set_settings(
             Config.setting_files(::Rails.root.join('config'), ::Rails.env)