diff --git a/gold/link/peer.go b/gold/link/peer.go
index aae95df..169f93a 100644
--- a/gold/link/peer.go
+++ b/gold/link/peer.go
@@ -33,7 +33,7 @@ func (m *Me) AddPeer(cfg *PeerConfig) (l *Link) {
 	if ok {
 		return
 	}
-	if cfg.MTU == 0 || (m.mtu != 0 && cfg.MTU > m.mtu) {
+	if m.mtu == 0 {
 		panic("invalid mtu for peer " + cfg.PeerIP)
 	}
 	l = &Link{