diff --git a/islandora.tokens.inc b/islandora.tokens.inc
index 316801171..f528dee3d 100644
--- a/islandora.tokens.inc
+++ b/islandora.tokens.inc
@@ -188,4 +188,5 @@ function islandora_url_to_service_file_media_by_mimetype($node, $mime_type) {
       }
     }
   }
+  return '';
 }