diff --git a/libavcodec/aasc.c b/libavcodec/aasc.c
index 26ba30dd14..17e639b05b 100644
--- a/libavcodec/aasc.c
+++ b/libavcodec/aasc.c
@@ -139,7 +139,7 @@ static int aasc_decode_frame(AVCodecContext *avctx,
         return ret;
 
     /* report that the buffer was completely consumed */
-    return buf_size;
+    return avpkt->size;
 }
 
 static av_cold int aasc_decode_end(AVCodecContext *avctx)