diff --git a/lib/action_controller/serialization.rb b/lib/action_controller/serialization.rb
index c19d1ea3..80c2b814 100644
--- a/lib/action_controller/serialization.rb
+++ b/lib/action_controller/serialization.rb
@@ -30,6 +30,11 @@ module ActionController
     included do
       class_attribute :_serialization_scope
       self._serialization_scope = :current_user
+
+      unless self.respond_to?(:responder=)
+        include ActionController::MimeResponds
+      end
+
       self.responder = ActiveModel::Serializer::Responder
       self.respond_to :json