diff --git a/samba/templates/smb.conf.erb b/samba/templates/smb.conf.erb
index 8a77f6f..8e60d5f 100644
--- a/samba/templates/smb.conf.erb
+++ b/samba/templates/smb.conf.erb
@@ -1,4 +1,3 @@
-
 [global]
 
 # host naming
@@ -33,7 +32,7 @@ ldap suffix = <%= @ldap_basedn %>
 security = domain
 password server = *
 <% elsif @auth == 'ad' -%>
-security = domain
+security = ADS
 realm = <%= @workgroup.upcase %>
 kerberos method = secrets and keytab
 <% else -%>