diff --git a/libavcodec/atrac3.c b/libavcodec/atrac3.c
index 9cf989246b..5bf992f395 100644
--- a/libavcodec/atrac3.c
+++ b/libavcodec/atrac3.c
@@ -912,6 +912,7 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
     } else {
         av_log(NULL, AV_LOG_ERROR, "Unknown extradata size %d.\n",
                avctx->extradata_size);
+        return AVERROR(EINVAL);
     }
 
     /* Check the extradata */