diff --git a/docs/book/src/cronjob-tutorial/testdata/project/config/default/kustomization.yaml b/docs/book/src/cronjob-tutorial/testdata/project/config/default/kustomization.yaml
index d9dc63e0d2a..f91d0c64e09 100644
--- a/docs/book/src/cronjob-tutorial/testdata/project/config/default/kustomization.yaml
+++ b/docs/book/src/cronjob-tutorial/testdata/project/config/default/kustomization.yaml
@@ -36,7 +36,7 @@ patchesStrategicMerge:
 
 # [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in
 # crd/kustomization.yaml
-#- manager_webhook_patch.yaml
+- manager_webhook_patch.yaml
 
 # [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'.
 # Uncomment 'CERTMANAGER' sections in crd/kustomization.yaml to enable the CA injection in the admission webhooks.