diff --git a/tracker/announce.go b/tracker/announce.go
index 44c8a04..303e1c2 100644
--- a/tracker/announce.go
+++ b/tracker/announce.go
@@ -114,7 +114,7 @@ func updateSwarm(c Conn, w Writer, ann *models.Announce, p *models.Peer, t *mode
 		t.Leechers[p.ID] = *p
 
 	default:
-		if ann.Event != "" {
+		if ann.Event != "" && ann.Event != "started" {
 			err = models.ErrBadRequest
 			w.WriteError(err)
 			return