Index: branches/5.2.x/core/units/helpers/user_helper.php
===================================================================
diff -u -N -r16513 -r16564
--- branches/5.2.x/core/units/helpers/user_helper.php	(.../user_helper.php)	(revision 16513)
+++ branches/5.2.x/core/units/helpers/user_helper.php	(.../user_helper.php)	(revision 16564)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: user_helper.php 16513 2017-01-20 14:10:53Z alex $
+* @version	$Id: user_helper.php 16564 2017-07-16 15:16:52Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -270,7 +270,7 @@
 			if ( !isset($cache) ) {
 				$sql = 'SELECT IPRestrictions, GroupId
 						FROM ' . TABLE_PREFIX . 'UserGroups
-						WHERE IPRestrictions IS NOT NULL';
+						WHERE COALESCE(IPRestrictions, "") <> ""';
 				$cache = $this->Conn->GetCol($sql, 'GroupId');
 			}