diff --git a/app/javascript/mastodon/features/audio/index.js b/app/javascript/mastodon/features/audio/index.js
index 2f85ebb7e..1ab1c3117 100644
--- a/app/javascript/mastodon/features/audio/index.js
+++ b/app/javascript/mastodon/features/audio/index.js
@@ -298,6 +298,8 @@ class Audio extends React.PureComponent {
 
   _renderCanvas () {
     requestAnimationFrame(() => {
+      if (!this.audio) return;
+
       this.handleTimeUpdate();
       this._clear();
       this._draw();
diff --git a/app/javascript/mastodon/features/video/index.js b/app/javascript/mastodon/features/video/index.js
index fb12567f0..99dcdca22 100644
--- a/app/javascript/mastodon/features/video/index.js
+++ b/app/javascript/mastodon/features/video/index.js
@@ -182,6 +182,8 @@ class Video extends React.PureComponent {
 
   _updateTime () {
     requestAnimationFrame(() => {
+      if (!this.video) return;
+
       this.handleTimeUpdate();
 
       if (!this.state.paused) {