diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index a229d9142c34455b2b1c27f8875d2d44fd8a049f..9aae14ec8c8f855750d8addb50bac11f721abdc8 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -549,7 +549,7 @@ def set_payload_for_mail(payload, mail) #:nodoc:
 
       def method_missing(method_name, *args) # :nodoc:
         if action_methods.include?(method_name.to_s)
-            MessageDelivery.new(self, method_name, *args)
+          MessageDelivery.new(self, method_name, *args)
         else
           super
         end