diff --git a/index.src.html b/index.src.html
index e571e6a6..33ca09b9 100644
--- a/index.src.html
+++ b/index.src.html
@@ -1940,7 +1940,7 @@
required DOMString codec;
[EnforceRange] required unsigned long sampleRate;
[EnforceRange] required unsigned long numberOfChannels;
- BufferSource description;
+ AllowSharedBufferSource description;
};