diff --git a/libavformat/wv.c b/libavformat/wv.c
index 7cace17f0b..5c9c31c72a 100644
--- a/libavformat/wv.c
+++ b/libavformat/wv.c
@@ -250,6 +250,7 @@ static int wv_read_packet(AVFormatContext *s,
     WVContext *wc = s->priv_data;
     int ret;
     int size, ver, off;
+    int64_t pos;
 
     if (s->pb->eof_reached)
         return AVERROR(EIO);
@@ -258,6 +259,7 @@ static int wv_read_packet(AVFormatContext *s,
             return -1;
     }
 
+    pos = wc->pos;
     off = wc->multichannel ? 4 : 0;
     if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
         return AVERROR(ENOMEM);
@@ -314,7 +316,7 @@ static int wv_read_packet(AVFormatContext *s,
     pkt->stream_index = 0;
     wc->block_parsed = 1;
     pkt->pts = wc->soff;
-    av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
+    av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
     return 0;
 }