diff --git a/htdocs/accountancy/bookkeeping/list.php b/htdocs/accountancy/bookkeeping/list.php
index b67b134e3e1..d110f74a6a6 100644
--- a/htdocs/accountancy/bookkeeping/list.php
+++ b/htdocs/accountancy/bookkeeping/list.php
@@ -682,13 +682,13 @@ if ($action == 'export_file') {
 		'name' => 'notifiedexportdate',
 		'type' => 'checkbox',
 		'label' => $langs->trans('NotifiedExportDate'),
-		'value' => (!empty($conf->global->ACCOUNTING_DEFAULT_NOT_NOTIFIED_EXPORT_DATE) ? 'false' : 'true'),
+		'value' => (empty($conf->global->ACCOUNTING_DEFAULT_NOTIFIED_EXPORT_DATE) ? false : true),
 	);
 	$form_question['notifiedvalidationdate'] = array(
 		'name' => 'notifiedvalidationdate',
 		'type' => 'checkbox',
 		'label' => $langs->trans('NotifiedValidationDate'),
-		'value' => (!empty($conf->global->ACCOUNTING_DEFAULT_NOT_NOTIFIED_VALIDATION_DATE) ? 'false' : 'true'),
+		'value' => (empty($conf->global->ACCOUNTING_DEFAULT_NOTIFIED_VALIDATION_DATE) ? false : true),
 	);
 
 	$formconfirm = $form->formconfirm($_SERVER["PHP_SELF"].'?'.$param, $langs->trans("ExportFilteredList").' ('.$listofformat[$formatexportset].')', $langs->trans('ConfirmExportFile'), 'export_fileconfirm', $form_question, '', 1, 300, 600);
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 975e6ed86ea..87d3d63cec1 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -4807,7 +4807,7 @@ class Form
 						$more .= '<div class="tagtr">';
 						$more .= '<div class="tagtd'.(empty($input['tdclass']) ? '' : (' '.$input['tdclass'])).'">'.$input['label'].' </div><div class="tagtd">';
 						$more .= '<input type="checkbox" class="flat'.$morecss.'" id="'.dol_escape_htmltag($input['name']).'" name="'.dol_escape_htmltag($input['name']).'"'.$moreattr;
-						if (!is_bool($input['value']) && $input['value'] != 'false' && $input['value'] != '0') {
+						if (!is_bool($input['value']) && $input['value'] != 'false' && $input['value'] != '0' && $input['value'] != '') {
 							$more .= ' checked';
 						}
 						if (is_bool($input['value']) && $input['value']) {