torrent.go | 10 +++++++++-

diff --git a/torrent.go b/torrent.go
index 83b6546b7a3f4f168f695a419959069c0a886e8d..bc3f2a082c1717ff33a1dde90e17cd5bb702635a 100644
--- a/torrent.go
+++ b/torrent.go
@@ -1325,14 +1325,22 @@
 // Returns an AnnounceRequest with fields filled out to defaults and current
 // values.
 func (t *Torrent) announceRequest() tracker.AnnounceRequest {
+	// Note that IPAddress is not set. It's set for UDP inside the tracker
+	// code, since it's dependent on the network in use.
 	return tracker.AnnounceRequest{
 		Event:    tracker.None,
 		NumWant:  -1,
 		Port:     uint16(t.cl.incomingPeerPort()),
 		PeerId:   t.cl.peerID,
 		InfoHash: t.infoHash,
-		Left:     t.bytesLeftAnnounce(),
 		Key:      t.cl.announceKey(),
+
+		// The following are vaguely described in BEP 3.
+
+		Left:     t.bytesLeftAnnounce(),
+		Uploaded: t.stats.BytesWrittenData,
+		// There's no mention of wasted or unwanted download in the BEP.
+		Downloaded: t.stats.BytesReadUsefulData,
 	}
 }