diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
index de8a64fce4..c3f5bdbd01 100644
--- a/libavformat/img2dec.c
+++ b/libavformat/img2dec.c
@@ -393,7 +393,7 @@ static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
         return AVERROR(ENOMEM);
     pkt->stream_index = 0;
     pkt->flags       |= AV_PKT_FLAG_KEY;
-    if (!s->is_pipe)
+    if (!s->is_pipe && !s->loop)
         pkt->pts      = s->img_number - s->img_first;
 
     pkt->size = 0;