diff --git a/config/v1alpha1/types.go b/config/v1alpha1/types.go
index db869f3..dee7bb1 100644
--- a/config/v1alpha1/types.go
+++ b/config/v1alpha1/types.go
@@ -361,6 +361,8 @@ type NamespaceControllerConfiguration struct {
 type NodeIPAMControllerConfiguration struct {
 	// serviceCIDR is CIDR Range for Services in cluster.
 	ServiceCIDR string
+	// secondaryServiceCIDR is CIDR Range for Services in cluster. This is used in dual stack clusters. SecondaryServiceCIDR must be of different IP family than ServiceCIDR
+	SecondaryServiceCIDR string
 	// NodeCIDRMaskSize is the mask size for node cidr in cluster.
 	NodeCIDRMaskSize int32
 }