diff --git a/README.md b/README.md
index df37345..ce5ac19 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ git clone https://gitea.zionetrix.net/bn8/check_syncrepl_extended.git /usr/local
 mkdir -p /usr/local/lib/nagios/plugins
 ln -s /usr/local/src/check_syncrepl_extended/check_syncrepl_extended /usr/local/lib/nagios/plugins/
 cat << EOF > /etc/nagios/nrpe.d/ldap-syncrepl.cfg
-command[check_syncrepl_extended]=/usr/local/lib/nagios/plugins/check_syncrepl_extended --nagios --attributes --provider ldaps://ldapmaster.foo --consumer ldaps://ldapslave.foo -D uid=nagios,ou=sysaccounts,o=example -P secret
+command[check_syncrepl_extended]=/usr/local/lib/nagios/plugins/check_syncrepl_extended --nagios --attributes --provider ldaps://ldapmaster.foo --consumer ldaps://ldapslave.foo --basedn o=example -D uid=nagios,ou=sysaccounts,o=example -P secret
 EOF
 service nagios-nrpe-server reload
 ```