diff --git a/proxy/wireguard/bind.go b/proxy/wireguard/bind.go
index 808d1094..79de7eba 100644
--- a/proxy/wireguard/bind.go
+++ b/proxy/wireguard/bind.go
@@ -230,9 +230,11 @@ func (e netEndpoint) SrcIP() netip.Addr {
 }
 
 func (e netEndpoint) DstToBytes() []byte {
-	var dat []byte = e.dst.Address.IP().To16()[:]
+	var dat []byte
 	if e.dst.Address.Family().IsIPv4() {
 		dat = e.dst.Address.IP().To4()[:]
+	} else {
+		dat = e.dst.Address.IP().To16()[:]
 	}
 	dat = append(dat, byte(e.dst.Port), byte(e.dst.Port>>8))
 	return dat