diff --git a/vendor/assets/javascripts/asciinema-player.js b/vendor/assets/javascripts/asciinema-player.js
index ba9a2ba..e5cd108 100644
--- a/vendor/assets/javascripts/asciinema-player.js
+++ b/vendor/assets/javascripts/asciinema-player.js
@@ -184,6 +184,8 @@
       time: function() {
         if (controller && controller.time) {
           return controller.time();
+        } else {
+          return 0;
         }
       },