diff --git a/api/v1alpha1/drpolicy_types.go b/api/v1alpha1/drpolicy_types.go
index 23be1e561a..5d7ccdc2c7 100644
--- a/api/v1alpha1/drpolicy_types.go
+++ b/api/v1alpha1/drpolicy_types.go
@@ -8,6 +8,7 @@ import (
 )
 
 // DRPolicySpec defines the desired state of DRPolicy
+// +kubebuilder:validation:XValidation:rule="self == oldSelf", message="Value is immutable"
 type DRPolicySpec struct {
 	// Important: Run "make" to regenerate code after modifying this file