diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index d66529a2a9c..426dfbb60ef 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -842,7 +842,7 @@ class Form
 
 		// Warning: if you set submit button to disabled, post using 'Enter' will no more work if there is no another input submit. So we add a hidden button
 		$ret .= '<input type="submit" name="confirmmassactioninvisible" style="display: none" tabindex="-1">'; // Hidden button BEFORE so it is the one used when we submit with ENTER.
-		$ret .= '<input type="submit" disabled name="confirmmassaction"' . (empty($conf->use_javascript_ajax) ? '' : ' style="display: none"') . ' class="button smallpaddingimp' . (empty($conf->use_javascript_ajax) ? '' : ' hideobject') . ' ' . $name . ' ' . $name . 'confirmed" value="' . dol_escape_htmltag($langs->trans("Confirm")) . '">';
+		$ret .= '<input type="submit" disabled name="confirmmassaction"' . (empty($conf->use_javascript_ajax) ? '' : ' style="display: none"') . ' class="reposition button smallpaddingimp' . (empty($conf->use_javascript_ajax) ? '' : ' hideobject') . ' ' . $name . ' ' . $name . 'confirmed" value="' . dol_escape_htmltag($langs->trans("Confirm")) . '">';
 		$ret .= '</div>';
 
 		if (!empty($conf->use_javascript_ajax)) {