diff --git a/proxy/vmess/inbound/inbound.go b/proxy/vmess/inbound/inbound.go
index 12809a149..2e5579f2d 100644
--- a/proxy/vmess/inbound/inbound.go
+++ b/proxy/vmess/inbound/inbound.go
@@ -220,7 +220,9 @@ func (this *VMessInboundHandler) HandleConnection(connection *hub.Connection) {
 
 	readFinish.Lock()
 }
-
+func (this *VMessInboundHandler) setProxyCap() {
+	this.meta.KcpSupported = true
+}
 func init() {
 	internal.MustRegisterInboundHandlerCreator("vmess",
 		func(space app.Space, rawConfig interface{}, meta *proxy.InboundHandlerMeta) (proxy.InboundHandler, error) {
diff --git a/proxy/vmess/outbound/outbound.go b/proxy/vmess/outbound/outbound.go
index 3c7f46c89..a06d95122 100644
--- a/proxy/vmess/outbound/outbound.go
+++ b/proxy/vmess/outbound/outbound.go
@@ -154,7 +154,9 @@ func (this *VMessOutboundHandler) handleResponse(session *raw.ClientSession, con
 
 	return
 }
-
+func (this *VMessOutboundHandler) setProxyCap() {
+	this.meta.KcpSupported = true
+}
 func init() {
 	internal.MustRegisterOutboundHandlerCreator("vmess",
 		func(space app.Space, rawConfig interface{}, meta *proxy.OutboundHandlerMeta) (proxy.OutboundHandler, error) {