diff --git a/apis/v1/gateway_types.go b/apis/v1/gateway_types.go
index 45b83667f6..d93b542ba0 100644
--- a/apis/v1/gateway_types.go
+++ b/apis/v1/gateway_types.go
@@ -485,6 +485,7 @@ type AllowedRoutes struct {
 	// +kubebuilder:validation:MaxItems=8
 	//
 	// The following list states the Route kinds compatible for each protocolType
+	// For route kinds and protocolTypes included in Gateway API
 	//
 	// HTTP: HTTPRoutes, GRPCRoutes
 	// HTTPS: HTTPRoutes, GRPCRoutes, TLSRoute