diff --git a/libavcodec/rl2.c b/libavcodec/rl2.c
index 1174c35d51..6f93604108 100644
--- a/libavcodec/rl2.c
+++ b/libavcodec/rl2.c
@@ -174,8 +174,6 @@ static av_cold int rl2_decode_init(AVCodecContext *avctx)
  * @param avctx decoder context
  * @param data decoded frame
  * @param data_size size of the decoded frame
- * @param buf input buffer
- * @param buf_size input buffer size
  * @return 0 success, -1 on error
  */
 static int rl2_decode_frame(AVCodecContext *avctx,