diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index f2471d122af..03a9d518021 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4855,7 +4855,7 @@ abstract class CommonObject
 	 */
 	public function printOriginLinesList($restrictlist = '', $selectedLines = array())
 	{
-		global $langs, $hookmanager, $conf, $form;
+		global $langs, $hookmanager, $conf, $form, $action;
 
 		print '<tr class="liste_titre">';
 		print '<td>'.$langs->trans('Ref').'</td>';