diff --git a/extra/BUILD_FFMPEGJS.md b/extra/BUILD_FFMPEGJS.md
index f13b4c6..ad5a35f 100644
--- a/extra/BUILD_FFMPEGJS.md
+++ b/extra/BUILD_FFMPEGJS.md
@@ -1,6 +1,6 @@
 # How to build ffmpegjs
 
-1. checkout https://github.com/ffmpegjs/FFmpeg
+1. checkout https://github.com/ffmpegjs/FFmpeg commit 0deba716e237a538
 2. replace `build-js.sh` with the `build-js.sh` from this directory
 3. run `build-with-docker.sh`
 4. copy `dist/ffmpeg-core.js` to this project `public` folder