diff --git a/app/router/config.pb.go b/app/router/config.pb.go
index aa81e47c..1d72d3b7 100644
--- a/app/router/config.pb.go
+++ b/app/router/config.pb.go
@@ -94,7 +94,8 @@ type Domain struct {
 	// Domain matching type.
 	Type Domain_Type `protobuf:"varint,1,opt,name=type,proto3,enum=v2ray.core.app.router.Domain_Type" json:"type,omitempty"`
 	// Domain value.
-	Value                string              `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+	Value string `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+	// Attributes of this domain. May be used for filtering.
 	Attribute            []*Domain_Attribute `protobuf:"bytes,3,rep,name=attribute,proto3" json:"attribute,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}            `json:"-"`
 	XXX_unrecognized     []byte              `json:"-"`