diff --git a/libavformat/utils.c b/libavformat/utils.c
index c228bc90dc..fa4b06ffd6 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -3326,7 +3326,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
              * sequence, we treat it as a discontinuity. */
             if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
                 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
-                (pkt->dts - st->info->fps_last_dts) / 1000 >
+                (pkt->dts - (uint64_t)st->info->fps_last_dts) / 1000 >
                 (st->info->fps_last_dts     - (uint64_t)st->info->fps_first_dts) /
                 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
                 av_log(ic, AV_LOG_WARNING,