diff --git a/classes/CustomerMessage.php b/classes/CustomerMessage.php
index 46b3aea66..a8ec2395d 100644
--- a/classes/CustomerMessage.php
+++ b/classes/CustomerMessage.php
@@ -84,7 +84,7 @@ class CustomerMessageCore extends ObjectModel
 			LEFT OUTER JOIN `'._DB_PREFIX_.'employee` e
 				ON e.`id_employee` = cm.`id_employee`
 			WHERE ct.id_order = '.(int)$id_order.'
-				AND '.(!$private ? 'cm.`private` = 0' : '').'
+			'.(!$private ? 'AND cm.`private` = 0' : '').'
 			GROUP BY cm.id_customer_message
 			ORDER BY cm.date_add DESC
 		');