diff --git a/libavformat/ogg2.c b/libavformat/ogg2.c
index d630d4a3da..64e7733d56 100644
--- a/libavformat/ogg2.c
+++ b/libavformat/ogg2.c
@@ -484,7 +484,8 @@ ogg_get_length (AVFormatContext * s)
     url_fseek (&s->pb, end, SEEK_SET);
 
     while (!ogg_read_page (s, &i)){
-        if (ogg->streams[i].granule != -1 && ogg->streams[i].granule != 0)
+        if (ogg->streams[i].granule != -1 && ogg->streams[i].granule != 0 &&
+            ogg->streams[i].codec)
             idx = i;
     }