diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index d1f67bbf70..4e02f046cd 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2290,7 +2290,7 @@ typedef struct AVCodecContext {
     /**
      * maximum bitrate
      * - encoding: Set by user.
-     * - decoding: unused
+     * - decoding: Set by libavcodec.
      */
     int rc_max_rate;