3 files changed, 5 insertions, 3 deletions
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 55f701b18e..509d859ac3 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -462,6 +462,7 @@ module ActionMailer
     helper ActionMailer::MailHelper
 
     class_attribute :delivery_job, default: ::ActionMailer::DeliveryJob
+    class_attribute :parameterized_delivery_job, default: ::ActionMailer::Parameterized::DeliveryJob
     class_attribute :default_params, default: {
       mime_version: "1.0",
       charset:      "UTF-8",
@@ -1008,7 +1009,7 @@ module ActionMailer
       end
 
       def instrument_name
-        "action_mailer".freeze
+        "action_mailer"
       end
 
       ActiveSupport.run_load_hooks(:action_mailer, self)
diff --git a/actionmailer/lib/action_mailer/message_delivery.rb b/actionmailer/lib/action_mailer/message_delivery.rb
index 2377aeb9a5..a57980c322 100644
--- a/actionmailer/lib/action_mailer/message_delivery.rb
+++ b/actionmailer/lib/action_mailer/message_delivery.rb
@@ -29,7 +29,7 @@ module ActionMailer
       @mail_message ||= processed_mailer.message
     end
 
-    # Unused except for delegator internals (dup, marshaling).
+    # Unused except for delegator internals (dup, marshalling).
     def __setobj__(mail_message) #:nodoc:
       @mail_message = mail_message
     end
diff --git a/actionmailer/lib/action_mailer/parameterized.rb b/actionmailer/lib/action_mailer/parameterized.rb
index 5e768e7106..0fe417affe 100644
--- a/actionmailer/lib/action_mailer/parameterized.rb
+++ b/actionmailer/lib/action_mailer/parameterized.rb
@@ -140,7 +140,8 @@ module ActionMailer
             super
           else
             args = @mailer_class.name, @action.to_s, delivery_method.to_s, @params, *@args
-            ActionMailer::Parameterized::DeliveryJob.set(options).perform_later(*args)
+            job = @mailer_class.parameterized_delivery_job
+            job.set(options).perform_later(*args)
           end
         end
     end