diff --git a/htdocs/projet/tasks/time.php b/htdocs/projet/tasks/time.php
index 83f27c11796..6271f0695fd 100644
--- a/htdocs/projet/tasks/time.php
+++ b/htdocs/projet/tasks/time.php
@@ -773,7 +773,7 @@ if (($id > 0 || !empty($ref)) || $projectidforalltimes > 0) {
 					print '<br>';
 				}
 				if (!empty($conf->eventorganization->enabled)) {
-					print '<input type="checkbox" disabled name="usage_organize_event"'.(GETPOSTISSET('usage_organize_event') ? (GETPOST('usage_organize_event', 'alpha') != '' ? ' checked="checked"' : '') : ($object->usage_organize_event ? ' checked="checked"' : '')).'"> ';
+					print '<input type="checkbox" disabled name="usage_organize_event"'.(GETPOSTISSET('usage_organize_event') ? (GETPOST('usage_organize_event', 'alpha') != '' ? ' checked="checked"' : '') : ($projectstatic->usage_organize_event ? ' checked="checked"' : '')).'"> ';
 					$htmltext = $langs->trans("EventOrganizationDescriptionLong");
 					print $form->textwithpicto($langs->trans("ManageOrganizeEvent"), $htmltext);
 				}