diff --git a/app/controllers/concerns/doi_request_administration.rb b/app/controllers/concerns/doi_request_administration.rb
index 73273b617..63bdf459d 100644
--- a/app/controllers/concerns/doi_request_administration.rb
+++ b/app/controllers/concerns/doi_request_administration.rb
@@ -97,7 +97,7 @@ def data_cite_metadata_json(ontology, ont_submission_id, current_user, portal_na
     json[:publisher] ||= portal_name
     json[:creators] ||= [{ name: current_user }]
 
-    json[:url] = json[:url] || (helpers.ontologies_url + '/' + ontology_acronym)
+    json[:url] = "#{helpers.ontologies_url}/#{ontology_acronym}"
     json
   end