--- charts-original/templates/crs/custom-resources.yaml
+++ charts/templates/crs/custom-resources.yaml
@@ -6,6 +6,10 @@
 {{ $secrets = append $secrets $item }}
 {{ end }}
 {{ $_ := set $installSpec "imagePullSecrets" $secrets }}
+{{ $defaultipPools := get .Values.installation.calicoNetwork "ipPools" | first }}
+{{ $defaultCIDR := get $defaultipPools "cidr" }}
+{{ $finalCIDR := coalesce .Values.global.clusterCIDR $defaultCIDR }}
+{{ $_ := set $defaultipPools "cidr" $finalCIDR }}
 
 apiVersion: operator.tigera.io/v1
 kind: Installation