diff --git a/html/includes/authentication/ldap.inc.php b/html/includes/authentication/ldap.inc.php
index d39ecd8b7..a142807c2 100644
--- a/html/includes/authentication/ldap.inc.php
+++ b/html/includes/authentication/ldap.inc.php
@@ -32,7 +32,7 @@ function authenticate($username,$password)
       {
         $ldap_groups = get_group_list();
         foreach($ldap_groups as $ldap_group) {
-          if (ldap_compare($ds,$ldap_group, $config['auth_ldap_groupmemberattr'],get_membername($username))===true)
+          if (ldap_compare($ds, $ldap_group, $config['auth_ldap_groupmemberattr'], get_membername($username))===true)
           {
             return 1;
           }
@@ -158,7 +158,7 @@ function get_userlist()
       $user_id  = $entry['uidnumber'][0];
       $ldap_groups = get_group_list();
       foreach($ldap_groups as $ldap_group) {
-        if (!isset($config['auth_ldap_group']) || ldap_compare($ds,$config['auth_ldap_group'],$config['auth_ldap_groupmemberattr'],get_membername($username))===true)
+        if (!isset($config['auth_ldap_group']) || ldap_compare($ds, $ldap_group, $config['auth_ldap_groupmemberattr'], get_membername($username))===true)
         {
           $userlist[] = array('username' => $username, 'realname' => $realname, 'user_id' => $user_id);
         }
@@ -202,6 +202,8 @@ function get_membername ($username)
 }
 
 function get_group_list() {
+  global $config;
+
   $ldap_groups = [];
   $ldap_groups[] = $config['auth_ldap_groupbase'];
   foreach($config['auth_ldap_groups'] as $key => $value) {