diff --git a/doc/guide/admin/proxycache.sdf b/doc/guide/admin/proxycache.sdf
index cbfc5d0334..3cf1f7ec70 100644
--- a/doc/guide/admin/proxycache.sdf
+++ b/doc/guide/admin/proxycache.sdf
@@ -102,6 +102,7 @@ at server {{EX:ldap.example.com}}.
  
 >	database 	ldap
 >	suffix 		"dc=example,dc=com" 
+>	rootdn 		"dc=example,dc=com" 
 >	uri    		ldap://ldap.example.com/dc=example%2cdc=com
 >	overlay proxycache
 >	proxycache    bdb 100000 1 1000 100