diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index a25612d2f9422ba66c97f5408d9e972fb97e3977..fdc86bb7c09025df30ff7536a0dd9a55efabb20c 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2611,7 +2611,7 @@ typedef struct AVCodecContext {
     /**
      * Audio channel layout.
      * - encoding: set by user.
-     * - decoding: set by libavcodec.
+     * - decoding: set by user, may be overwritten by libavcodec.
      */
     int64_t channel_layout;