diff --git a/adapter/outbound/hysteria.go b/adapter/outbound/hysteria.go
index 9dc34b44..cd36db5a 100644
--- a/adapter/outbound/hysteria.go
+++ b/adapter/outbound/hysteria.go
@@ -334,7 +334,7 @@ type hyDialerWithContext struct {
 func (h *hyDialerWithContext) ListenPacket(rAddr net.Addr) (net.PacketConn, error) {
 	network := "udp"
 	if addrPort, err := netip.ParseAddrPort(rAddr.String()); err == nil {
-		if addrPort.Addr().Is6() {
+		if addrPort.Addr().Unmap().Is6() {
 			network = "udp6"
 		}
 	}
diff --git a/adapter/outbound/tuic.go b/adapter/outbound/tuic.go
index 8df1539a..5119f8d2 100644
--- a/adapter/outbound/tuic.go
+++ b/adapter/outbound/tuic.go
@@ -80,7 +80,7 @@ func (t *Tuic) dial(ctx context.Context, opts ...dialer.Option) (pc net.PacketCo
 	}
 	addr = udpAddr
 	network := "udp"
-	if udpAddr.AddrPort().Addr().Is6() {
+	if udpAddr.AddrPort().Addr().Unmap().Is6() {
 		network = "udp6"
 	}
 	pc, err = dialer.ListenPacket(ctx, network, "", opts...)