diff --git a/docs/admin/kubeadm.md b/docs/admin/kubeadm.md
index 514b5ad89a..c7336565ba 100644
--- a/docs/admin/kubeadm.md
+++ b/docs/admin/kubeadm.md
@@ -295,6 +295,8 @@ apiServerCertSANs:
   - <name2|string>
 certificatesDir: <string>
 ```
+In addition, if authorizationMode is set to `ABAC`, you should write the config to `/etc/kubernetes/abac_policy.json`.
+However, if authorizationMode is set to `Webhook`, you should write the config to `/etc/kubernetes/webhook_authz.conf`.
 
 ### Sample Node Configuration