diff --git a/downstream.go b/downstream.go
index a58b381..aaf482e 100644
--- a/downstream.go
+++ b/downstream.go
@@ -421,7 +421,6 @@ func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
 
 			if modeStr != "" {
 				uc.SendMessage(&irc.Message{
-					Prefix:  uc.prefix(),
 					Command: "MODE",
 					Params:  []string{upstreamName, modeStr},
 				})
@@ -451,7 +450,6 @@ func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
 			if modeStr != "" {
 				dc.user.forEachUpstream(func(uc *upstreamConn) {
 					uc.SendMessage(&irc.Message{
-						Prefix:  uc.prefix(),
 						Command: "MODE",
 						Params:  []string{uc.nick, modeStr},
 					})
@@ -477,7 +475,6 @@ func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
 			}
 
 			uc.SendMessage(&irc.Message{
-				Prefix:  uc.prefix(),
 				Command: "PRIVMSG",
 				Params:  []string{upstreamName, text},
 			})
diff --git a/upstream.go b/upstream.go
index c0ece12..0ce0bcb 100644
--- a/upstream.go
+++ b/upstream.go
@@ -91,14 +91,6 @@ func connectToUpstream(u *user, upstream *Upstream) (*upstreamConn, error) {
 	return uc, nil
 }
 
-func (uc *upstreamConn) prefix() *irc.Prefix {
-	return &irc.Prefix{
-		Name: uc.nick,
-		User: uc.upstream.Username,
-		// TODO: fill the host?
-	}
-}
-
 func (uc *upstreamConn) Close() error {
 	if uc.closed {
 		return fmt.Errorf("upstream connection already closed")