diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 98854b032f..e994786bba 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1803,7 +1803,7 @@ static int matroska_read_header(AVFormatContext *s)
             track->audio.sub_packet_h    = avio_rb16(&b);
             track->audio.frame_size      = avio_rb16(&b);
             track->audio.sub_packet_size = avio_rb16(&b);
-            if (flavor <= 0 || track->audio.coded_framesize <= 0 ||
+            if (flavor < 0 || track->audio.coded_framesize <= 0 ||
                 track->audio.sub_packet_h <= 0 || track->audio.frame_size <= 0 ||
                 track->audio.sub_packet_size <= 0)
                 return AVERROR_INVALIDDATA;