diff --git a/inc/drivers_ldap.php b/inc/drivers_ldap.php
index eec356e2..bdd6e5ca 100644
--- a/inc/drivers_ldap.php
+++ b/inc/drivers_ldap.php
@@ -111,7 +111,7 @@ class ldapDriver
       //root to start search
       $this->baseDNUsers  = is_string($config['baseDNUsers']) ? array($config['baseDNUsers']) : $config['baseDNUsers'];
       $this->filterUsers  = (isset($config['filterUsers'])  ? $config['filterUsers']  : null);
-      $this->baseDNGroups = is_string($config['baseDNGroups']) ? array($config['baseDNGroups']) : $config['baseDNGroups'];
+      $this->baseDNGroups = (isset($config['baseDNGroups']) ? (is_string($config['baseDNGroups']) ? array($config['baseDNGroups']) : $config['baseDNGroups']) : null);
       $this->filterGroups = (isset($config['filterGroups']) ? $config['filterGroups'] : null);
   }
 
@@ -195,6 +195,7 @@ class ldapDriver
     $entry=NULL;
     // We get the DN of the USER
     $query = $this->ldap_query_one;
+    # ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);
 
     foreach($this->baseDNUsers as $baseDNUsers) {
       $entry = $query($this->connect, $baseDNUsers, $filter, $attributes);