diff --git a/libsquoosh/README.md b/libsquoosh/README.md
index 52affed7..1492af9c 100644
--- a/libsquoosh/README.md
+++ b/libsquoosh/README.md
@@ -170,3 +170,4 @@ const encodeOptions: {
 [codecs.ts]: https://github.com/GoogleChromeLabs/squoosh/blob/dev/libsquoosh/src/codecs.ts
 [butteraugli]: https://github.com/google/butteraugli
 [readfile]: https://nodejs.org/api/fs.html#fs_fspromises_readfile_path_options
+[arraybuffer]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer