diff --git a/classes/module/Module.php b/classes/module/Module.php
index b521e0fe4..225f492bf 100644
--- a/classes/module/Module.php
+++ b/classes/module/Module.php
@@ -1354,7 +1354,7 @@ abstract class ModuleCore
 		elseif (isset($context->customer))
 		{
 			$groups = $context->customer->getGroups();
-			if (empty($groups))
+			if (!count($groups))
 				$groups = array(Configuration::get('PS_UNIDENTIFIED_GROUP'));
 		}
 
@@ -1377,7 +1377,7 @@ abstract class ModuleCore
 		'.(isset($billing) && $frontend ? 'AND mc.id_country = '.(int)$billing->id_country : '').'
 		AND (SELECT COUNT(*) FROM '._DB_PREFIX_.'module_shop ms WHERE ms.id_module = m.id_module AND ms.id_shop IN('.implode(', ', $list).')) = '.count($list).'
 		AND hm.id_shop IN('.implode(', ', $list).')
-		'.(count($groups) && $frontend ? 'AND (mg.`id_group` IN('.implode(', ', $groups).'))' : '').$paypal_condition.'
+		'.((count($groups) && $frontend) ? 'AND (mg.`id_group` IN ('.implode(', ', $groups).'))' : '').$paypal_condition.'
 		GROUP BY hm.id_hook, hm.id_module
 		ORDER BY hm.`position`, m.`name` DESC');
 	}