diff --git a/tips/use-kerberos.md b/tips/use-kerberos.md
index 27b511b..3aab1c7 100644
--- a/tips/use-kerberos.md
+++ b/tips/use-kerberos.md
@@ -147,6 +147,7 @@ This is my example. Note that some domain names under `[realms]` and `[domain_re
   dns_lookup_realm = false
   dns_lookup_kdc = false
   rdns = false
+  default_realm = KUROKOBO.INTERNAL
 
 [realms]
   KUROKOBO.INTERNAL = {