diff --git a/assets/runtime/config/gitlabhq/smtp_settings.rb b/assets/runtime/config/gitlabhq/smtp_settings.rb
index b824f3e0..f9969b86 100644
--- a/assets/runtime/config/gitlabhq/smtp_settings.rb
+++ b/assets/runtime/config/gitlabhq/smtp_settings.rb
@@ -10,6 +10,7 @@
 if Rails.env.production?
   Rails.application.config.action_mailer.delivery_method = :smtp
 
+  ActionMailer::Base.default_delivery = :smtp
   ActionMailer::Base.smtp_settings = {
     address: "{{SMTP_HOST}}",
     port: {{SMTP_PORT}},