diff --git a/app/serializers/doi_serializer.rb b/app/serializers/doi_serializer.rb
index ba81de691..db6c1b7a4 100644
--- a/app/serializers/doi_serializer.rb
+++ b/app/serializers/doi_serializer.rb
@@ -12,7 +12,7 @@ class DoiSerializer
   has_many :media, if: Proc.new { |object, params| params && params[:detail] }
 
   attribute :xml, if: Proc.new { |object, params| params && params[:detail] } do |object|
-    Base64.strict_encode64(object.xml) if object.xml.present?
+    xml_encoded
   end
 
   attribute :doi do |object|