diff --git a/libavformat/apngdec.c b/libavformat/apngdec.c
index ffff03710a..f9a97e5681 100644
--- a/libavformat/apngdec.c
+++ b/libavformat/apngdec.c
@@ -44,7 +44,6 @@ typedef struct APNGDemuxContext {
     int max_fps;
     int default_fps;
 
-    int64_t pkt_pts;
     int pkt_duration;
 
     int is_key_frame;
@@ -390,9 +389,8 @@ static int apng_read_packet(AVFormatContext *s, AVPacket *pkt)
 
         if (ctx->is_key_frame)
             pkt->flags |= AV_PKT_FLAG_KEY;
-        pkt->pts = ctx->pkt_pts;
+        pkt->pts = pkt->dts = AV_NOPTS_VALUE;
         pkt->duration = ctx->pkt_duration;
-        ctx->pkt_pts += ctx->pkt_duration;
         return ret;
     case MKTAG('I', 'E', 'N', 'D'):
         ctx->cur_loop++;