diff --git a/app/jobs/priorized_mail_delivery_job.rb b/app/jobs/priorized_mail_delivery_job.rb
index 8ebe5549c..4b598bf43 100644
--- a/app/jobs/priorized_mail_delivery_job.rb
+++ b/app/jobs/priorized_mail_delivery_job.rb
@@ -11,6 +11,6 @@ class PriorizedMailDeliveryJob < ActionMailer::MailDeliveryJob
   end
 
   def custom_queue
-    ENV.fetch('BULK_EMAIL_QUEUE') { Rails.application.config.action_mailer.deliver_later_queue_name }
+    ENV.fetch('BULK_EMAIL_QUEUE') { Rails.application.config.action_mailer.deliver_later_queue_name.to_s }
   end
 end