connection.go | 11 ++++++++++-

diff --git a/connection.go b/connection.go
index 91d5b327451cd8938165bdb0e7633f0edb8e829b..10e84d0259d08fd283ac69161803182fa6deb24f 100644
--- a/connection.go
+++ b/connection.go
@@ -66,10 +66,19 @@ 	c := func(b byte) {
 		fmt.Fprintf(w, "%c", b)
 	}
 	// https://trac.transmissionbt.com/wiki/PeerStatusText
+	if cn.PeerInterested && !cn.Choked {
+		c('O')
+	}
 	if len(cn.Requests) != 0 {
 		c('D')
-	} else if cn.Interested {
+	}
+	if cn.PeerChoked && cn.Interested {
 		c('d')
+	}
+	if !cn.Choked && cn.PeerInterested {
+		c('U')
+	} else {
+		c('u')
 	}
 	if !cn.PeerChoked && !cn.Interested {
 		c('K')