diff --git a/transport/vless/service.go b/transport/vless/service.go
index 7b690202..ae329ba4 100644
--- a/transport/vless/service.go
+++ b/transport/vless/service.go
@@ -70,7 +70,7 @@ func (s *Service[T]) NewConnection(ctx context.Context, conn net.Conn, metadata
 	userFlow := s.userFlow[user]
 	if request.Flow == FlowVision && request.Command == vmess.NetworkUDP {
 		return E.New(FlowVision, " flow does not support UDP")
-	} else if request.Flow != userFlow {
+	} else if request.Flow != userFlow && request.Command != vmess.CommandUDP {
 		return E.New("flow mismatch: expected ", flowName(userFlow), ", but got ", flowName(request.Flow))
 	}