diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 4abb480af28..391462c98c0 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -8412,7 +8412,7 @@ class Form
             </dt>
             <dd class="dropdowndd">
                 <div class="multiselectcheckbox'.$htmlname.'">
-                    <ul class="ul'.$htmlname.' '.$htmlname.$pos.'">
+                    <ul class="'.$htmlname.($pos == '1' ? 'left' : '').'">
                     <li><input class="inputsearch_dropdownselectedfields width90p minwidth200" style="width:90%;" type="text" placeholder="'.dol_escape_js($langs->trans('Search')).'"></li>
                     '.$listoffieldsforselection.'
                     </ul>