diff --git a/libavformat/ogg2.c b/libavformat/ogg2.c
index 1e5d3862051f99560e30ac33bef52c61dae1bedd..d630d4a3da9b5acc261cbd8fee0a21aec65c7d50 100644
--- a/libavformat/ogg2.c
+++ b/libavformat/ogg2.c
@@ -90,6 +90,7 @@ ogg_save (AVFormatContext * s)
     ost->pos = url_ftell (&s->pb);;
     ost->curidx = ogg->curidx;
     ost->next = ogg->state;
+    ost->nstreams = ogg->nstreams;
     memcpy(ost->streams, ogg->streams, ogg->nstreams * sizeof(*ogg->streams));
 
     for (i = 0; i < ogg->nstreams; i++){
@@ -123,8 +124,9 @@ ogg_restore (AVFormatContext * s, int discard)
 
         url_fseek (bc, ost->pos, SEEK_SET);
         ogg->curidx = ost->curidx;
-        memcpy (ogg->streams, ost->streams,
-        ogg->nstreams * sizeof (*ogg->streams));
+        ogg->nstreams = ost->nstreams;
+        memcpy(ogg->streams, ost->streams,
+               ost->nstreams * sizeof(*ogg->streams));
     }
 
     av_free (ost);
diff --git a/libavformat/ogg2.h b/libavformat/ogg2.h
index dd6f24aab6ebd674d5ec3d25340118021cbc9fbd..6b7c6b22ec75052739ece58bc734c5d4e95252f6 100644
--- a/libavformat/ogg2.h
+++ b/libavformat/ogg2.h
@@ -57,6 +57,7 @@ typedef struct ogg_state {
     uint64_t pos;
     int curidx;
     struct ogg_state *next;
+    int nstreams;
     ogg_stream_t streams[1];
 } ogg_state_t;