diff --git a/transport/internet/sockopt_windows.go b/transport/internet/sockopt_windows.go
index f1d4ba2b..dd3f0390 100644
--- a/transport/internet/sockopt_windows.go
+++ b/transport/internet/sockopt_windows.go
@@ -40,7 +40,10 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 		if err != nil {
 			return errors.New("failed to find the interface").Base(err)
 		}
-		isV4 := (network == "tcp4" || network == "udp4")
+		// easy way to check if the address is ipv4
+		isV4 := strings.Contains(address, ".")
+		// note: DO NOT trust the passed network variable, it can be udp6 even if the address is ipv4
+		// because operating system might(always) use ipv6 socket to process ipv4
 		if isV4 {
 			var bytes [4]byte
 			binary.BigEndian.PutUint32(bytes[:], uint32(inf.Index))
diff --git a/transport/internet/system_dialer.go b/transport/internet/system_dialer.go
index 63365099..658382f7 100644
--- a/transport/internet/system_dialer.go
+++ b/transport/internet/system_dialer.go
@@ -63,7 +63,7 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 		lc.Control = func(network, address string, c syscall.RawConn) error {
 			return c.Control(func(fd uintptr) {
 				if sockopt != nil {
-					if err := applyOutboundSocketOptions(network, "", fd, sockopt); err != nil {
+					if err := applyOutboundSocketOptions(network, dest.NetAddr(), fd, sockopt); err != nil {
 						errors.LogInfo(ctx, err, "failed to apply socket options")
 					}
 				}