diff --git a/gateway/gateway.go b/gateway/gateway.go
index 8b1223f0..9c1fbe3c 100644
--- a/gateway/gateway.go
+++ b/gateway/gateway.go
@@ -287,6 +287,8 @@ func (gw *Gateway) modifyUsername(msg config.Message, dest *bridge.Bridge) strin
 	nick = strings.Replace(nick, "{NICK}", msg.Username, -1)
 	nick = strings.Replace(nick, "{BRIDGE}", br.Name, -1)
 	nick = strings.Replace(nick, "{PROTOCOL}", br.Protocol, -1)
+	nick_parts := strings.Split(msg.Username, ":")
+	nick = strings.Replace(nick, "{LOCALPART}", nick_parts[0], -1)
 	return nick
 }