diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 2fe1db5301..ac91f67ad5 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1676,6 +1676,7 @@ static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
  */
 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
 {
+    matroska->prev_pkt = NULL;
     if (matroska->packets) {
         int n;
         for (n = 0; n < matroska->num_packets; n++) {