diff --git a/js/main.js b/js/main.js
index 6de5cbe..4600a99 100644
--- a/js/main.js
+++ b/js/main.js
@@ -135,7 +135,7 @@ async function loadExamList(data) {
         })
     );
   });
-  if (config.exam_results_url != "") {
+  if (config.exam_results_url != "" && config.exam_results_url != undefined) {
     let url = config.exam_results_url;
 
     $("#options-link")