diff --git a/docs/admin/kubeadm.md b/docs/admin/kubeadm.md
index 1014ee1ab6..edf9c87a7d 100644
--- a/docs/admin/kubeadm.md
+++ b/docs/admin/kubeadm.md
@@ -191,6 +191,7 @@ available as configuration file options.
       externalDNSNames:
       - <dnsname1|string>
       - <dnsname2|string>
+    authorizationMode: <string>
     cloudProvider: <string>
     discovery:
       bindPort: <int>