diff --git a/assets/js/watched_widget.js b/assets/js/watched_widget.js
index fb4275a3..3cf7c332 100644
--- a/assets/js/watched_widget.js
+++ b/assets/js/watched_widget.js
@@ -45,6 +45,9 @@ for (var i = 0; i < watchedIndicators.length; i++) {
     var indicator = watchedIndicators[i];
     var watched_part = get_all_video_times()[indicator.getAttribute('data-id')];
     var total = parseInt(indicator.getAttribute('data-length'), 10);
+    if (watched_part === undefined) {
+        watched_part = total;
+    }
     var percentage = Math.round((watched_part / total) * 100);
 
     if (percentage < 5) {