diff --git a/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php b/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php
index 7ce0ae7d0d0..b3973241e9e 100644
--- a/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php
+++ b/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php
@@ -790,7 +790,7 @@ class InterfaceActionsAuto extends DolibarrTriggers
 
 		$elementid = $object->id; // id of object
 		$elementtype = $object->element;
-		$elementmodule = $object->module;
+		$elementmodule = (empty($object->module) ? '' : $object->module);
 		if ($object->element == 'subscription') {
 			$elementid = $object->fk_adherent;
 			$elementtype = 'member';