diff --git a/lib/ds_ldap.php b/lib/ds_ldap.php
index 05356b1..5494eb8 100644
--- a/lib/ds_ldap.php
+++ b/lib/ds_ldap.php
@@ -258,6 +258,9 @@ class ldap extends DS {
 			else
 				$userDN = $this->getLoginID($user,'login');
 
+			if (! $userDN && $this->getValue('login','fallback_dn'))
+				$userDN = $user;
+
 			if (! $userDN)
 				return false;
 
diff --git a/lib/ds_ldap_pla.php b/lib/ds_ldap_pla.php
index f45b1de..f5b91ab 100644
--- a/lib/ds_ldap_pla.php
+++ b/lib/ds_ldap_pla.php
@@ -27,6 +27,10 @@ class ldap_pla extends ldap {
 			'desc'=>'Whether to show the "Create new Entry here" in the tree browser',
 			'default'=>true);
 
+		$this->default->login['fallback_dn'] = array(
+			'desc'=>'If the attribute base login fails, see if a DN was entered',
+			'default'=>false);
+
 		$this->default->query['disable_default'] = array(
 			'desc'=>'Configuration to disable the default query template',
 			'default'=>false);