diff --git a/demux/demux_mkv.c b/demux/demux_mkv.c
index 4b9551adae..3256c5f389 100644
--- a/demux/demux_mkv.c
+++ b/demux/demux_mkv.c
@@ -2448,12 +2448,10 @@ static void mkv_parse_and_add_packet(demuxer_t *demuxer, mkv_track_t *track,
             struct demux_packet *new = new_demux_packet_from(data, size);
             if (!new)
                 break;
-            demux_packet_copy_attribs(new, dp);
-#if LIBAVCODEC_VERSION_MICRO >= 100
             if (copy_sidedata)
-                av_copy_packet_side_data(new->avpacket, dp->avpacket);
-#endif
+                av_packet_copy_props(new->avpacket, dp->avpacket);
             copy_sidedata = false;
+            demux_packet_copy_attribs(new, dp);
             if (track->parse_timebase) {
                 new->pts = track->av_parser->pts == AV_NOPTS_VALUE
                          ? MP_NOPTS_VALUE : track->av_parser->pts / tb;