diff --git a/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php b/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php
index a66b95c11cd..afa03ee27c4 100644
--- a/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php
+++ b/htdocs/core/triggers/interface_50_modAgenda_ActionsAuto.class.php
@@ -1093,7 +1093,7 @@ class InterfaceActionsAuto extends DolibarrTriggers
 			}
 
 			$object->sendtoid = 0;
-			if ($object->fk_soc > 0) {
+			if (isset($object->fk_soc) && $object->fk_soc > 0) {
 				$object->socid = $object->fk_soc;
 			}
 		} elseif ($action == 'MEMBER_SUBSCRIPTION_DELETE') {