diff --git a/data/interfaces/default/index.html b/data/interfaces/default/index.html
index 16ead2e4..39d427f6 100644
--- a/data/interfaces/default/index.html
+++ b/data/interfaces/default/index.html
@@ -510,7 +510,7 @@
                             .attr('data-original-title', 'Transcoder Progress ' + s.transcode_progress + '%');
                         var progress_bar = $('#progress-bar-' + key);
                         progress_bar.data('state', s.state);
-                        if (progress_bar.data('last_view_offset') !== s.view_offset) {
+                        if (progress_bar.data('last_view_offset') && progress_bar.data('last_view_offset') !== s.view_offset) {
                             progress_bar.data('last_view_offset', s.view_offset).data('view_offset', s.view_offset);
                         }