diff --git a/proto-public/pbmesh/v2beta1/mesh_gateway.pb.go b/proto-public/pbmesh/v2beta1/mesh_gateway.pb.go
index a8bc0c9369..0fcfa4bf96 100644
--- a/proto-public/pbmesh/v2beta1/mesh_gateway.pb.go
+++ b/proto-public/pbmesh/v2beta1/mesh_gateway.pb.go
@@ -87,6 +87,8 @@ type MeshGatewayListener struct {
 	unknownFields protoimpl.UnknownFields
 
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	// +kubebuilder:validation:Maximum=65535
+	// +kubebuilder:validation:Minimum=0
 	Port uint32 `protobuf:"varint,2,opt,name=port,proto3" json:"port,omitempty"`
 }
 
diff --git a/proto-public/pbmesh/v2beta1/mesh_gateway.proto b/proto-public/pbmesh/v2beta1/mesh_gateway.proto
index 0caaf7ab48..ca5dd67756 100644
--- a/proto-public/pbmesh/v2beta1/mesh_gateway.proto
+++ b/proto-public/pbmesh/v2beta1/mesh_gateway.proto
@@ -19,5 +19,7 @@ message MeshGateway {
 
 message MeshGatewayListener {
   string name = 1;
+  // +kubebuilder:validation:Maximum=65535
+  // +kubebuilder:validation:Minimum=0
   uint32 port = 2;
 }