diff --git a/libavformat/mux.c b/libavformat/mux.c
index 023832c336..adf817112e 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -490,6 +490,7 @@ static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
 
     if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
         ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
+          st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE &&
           st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
         av_log(s, AV_LOG_ERROR,
                "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",