diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 02421ea9157..bbca87fe125 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -6760,7 +6760,7 @@ abstract class CommonObject
 			$out .= '</select>';
 		} elseif ($type == 'checkbox') {
 			$value_arr = explode(',', $value);
-			$out = $form->multiselectarray($keyprefix.$key.$keysuffix, (empty($param['options']) ?null:$param['options']), $value_arr, '', 0, '', 0, '100%');
+			$out = $form->multiselectarray($keyprefix.$key.$keysuffix, (empty($param['options']) ?null:$param['options']), $value_arr, '', 0, $morecss, 0, '100%');
 		} elseif ($type == 'radio') {
 			$out = '';
 			foreach ($param['options'] as $keyopt => $val) {