1 files changed, 2 insertions, 1 deletions
diff --git a/youtube/static/js/watch.js b/youtube/static/js/watch.js
index 95d9fa7..00803cf 100644
--- a/youtube/static/js/watch.js
+++ b/youtube/static/js/watch.js
@@ -5,8 +5,9 @@ function changeQuality(selection) {
     let videoPaused = video.paused;
     let videoSpeed = video.playbackRate;
     let srcInfo;
-    if (avMerge)
+    if (avMerge && typeof avMerge.close === 'function') {
         avMerge.close();
+    }
     if (selection.type == 'uni'){
         srcInfo = data['uni_sources'][selection.index];
         video.src = srcInfo.url;