diff --git a/core/util/browser.js b/core/util/browser.js
index c613a7e9f..e13273489 100644
--- a/core/util/browser.js
+++ b/core/util/browser.js
@@ -107,7 +107,8 @@ export const hasScrollbarGutter = _hasScrollbarGutter;
 export let supportsWebCodecsH264Decode = false;
 
 async function _checkWebCodecsH264DecodeSupport() {
-    if (!('VideoDecoder' in window)) {
+    if (!('VideoDecoder' in window) ||
+        !('isConfigSupported' in VideoDecoder)) {
         return false;
     }