diff --git a/libavformat/4xm.c b/libavformat/4xm.c
index 5fb1921dd9..9dfb95650f 100644
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@@ -136,6 +136,8 @@ static int parse_strk(AVFormatContext *s,
         av_log(s, AV_LOG_ERROR, "current_track too large\n");
         return AVERROR_INVALIDDATA;
     }
+    if (track < 0)
+        return AVERROR_INVALIDDATA;
     if (track + 1 > fourxm->track_count) {
         AudioTrack *tmp = av_realloc(fourxm->tracks,
                                      (track + 1) * sizeof(AudioTrack));