diff --git a/static/js/debug.js b/static/js/debug.js
index 04f2eeb30..380954556 100644
--- a/static/js/debug.js
+++ b/static/js/debug.js
@@ -348,7 +348,7 @@ function processUrl() {
         }
 
         // Response status.
-        $status.attr('class', 'alert alert-success').show().text(jqXHR.status + ' ' + jqXHR.statusText + ' - ' + data.time.total + 'ms');
+        $status.attr('class', 'alert alert-success').show().text(jqXHR.status + ' ' + jqXHR.statusText + ' - ' + (data.time ? data.time.total : '? ') + 'ms');
 
         // Errors.
         data.allData.forEach(function(result) {
@@ -479,4 +479,4 @@ $(document).ready(function(){
             }, 0);
         }
     };
-});
\ No newline at end of file
+});