diff --git a/libavformat/vqf.c b/libavformat/vqf.c
index 27890f8482..b0ec020511 100644
--- a/libavformat/vqf.c
+++ b/libavformat/vqf.c
@@ -189,6 +189,7 @@ static int vqf_read_header(AVFormatContext *s, AVFormatParameters *ap)
         return -1;
     }
     c->frame_bit_len = st->codec->bit_rate*size/st->codec->sample_rate;
+    av_set_pts_info(st, 64, 1, st->codec->sample_rate);
 
     return 0;
 }