diff --git a/libavformat/dhav.c b/libavformat/dhav.c
index faaa1f6177..91c175498c 100644
--- a/libavformat/dhav.c
+++ b/libavformat/dhav.c
@@ -290,6 +290,8 @@ static int dhav_read_header(AVFormatContext *s)
                 int seek_back;
 
                 seek_back = avio_rl32(s->pb) + 8;
+                if (seek_back < 9)
+                    break;
                 dhav->last_good_pos = avio_tell(s->pb);
                 avio_seek(s->pb, -seek_back, SEEK_CUR);
             }