--- a/dom/media/ogg/OggCodecState.cpp
+++ b/dom/media/ogg/OggCodecState.cpp
@@ -209,18 +209,17 @@ RefPtr<MediaRawData> OggCodecState::Pack
   RefPtr<MediaRawData> sample = new MediaRawData(packet->packet, packet->bytes);
 
   int64_t end_tstamp = Time(packet->granulepos);
   NS_ASSERTION(end_tstamp >= 0, "timestamp invalid");
 
   int64_t duration = PacketDuration(packet);
   NS_ASSERTION(duration >= 0, "duration invalid");
 
-  sample->mTimecode = packet->granulepos;
-  sample->mTime = end_tstamp - duration;
+  sample->mTimecode = sample->mTime = end_tstamp - duration;
   sample->mDuration = duration;
   sample->mKeyframe = IsKeyframe(packet);
 
   // The packet's data now belongs to the ref-counted MediaRawData instance;
   // free the ogg_packet structure only.
   delete packet;
 
   return sample;