diff --git a/option/outbound.go b/option/outbound.go
index 112572bd..9b04de93 100644
--- a/option/outbound.go
+++ b/option/outbound.go
@@ -83,7 +83,6 @@ type DialerOptions struct {
 	NetworkType         badoption.Listable[InterfaceType] `json:"network_type,omitempty"`
 	FallbackNetworkType badoption.Listable[InterfaceType] `json:"fallback_network_type,omitempty"`
 	FallbackDelay       badoption.Duration                `json:"fallback_delay,omitempty"`
-	IsWireGuardListener bool                              `json:"-"`
 
 	// Deprecated: migrated to domain resolver
 	DomainStrategy DomainStrategy `json:"domain_strategy,omitempty"`
diff --git a/protocol/wireguard/endpoint.go b/protocol/wireguard/endpoint.go
index 29acbf12..4165d126 100644
--- a/protocol/wireguard/endpoint.go
+++ b/protocol/wireguard/endpoint.go
@@ -45,8 +45,8 @@ func NewEndpoint(ctx context.Context, router adapter.Router, logger log.ContextL
 		logger:         logger,
 		localAddresses: options.Address,
 	}
-	if options.Detour == "" {
-		options.IsWireGuardListener = true
+	if options.Detour != "" && options.ListenPort != 0 {
+		return nil, E.New("`listen_port` is conflict with `detour`")
 	}
 	outboundDialer, err := dialer.NewWithOptions(dialer.Options{
 		Context: ctx,
diff --git a/protocol/wireguard/outbound.go b/protocol/wireguard/outbound.go
index 1e7a32c7..129e69b8 100644
--- a/protocol/wireguard/outbound.go
+++ b/protocol/wireguard/outbound.go
@@ -46,9 +46,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		logger:         logger,
 		localAddresses: options.LocalAddress,
 	}
-	if options.Detour == "" {
-		options.IsWireGuardListener = true
-	} else if options.GSO {
+	if options.Detour != "" && options.GSO {
 		return nil, E.New("gso is conflict with detour")
 	}
 	outboundDialer, err := dialer.NewWithOptions(dialer.Options{