diff --git a/htdocs/salaries/card.php b/htdocs/salaries/card.php
index ebb46d775c7..535c6aea693 100644
--- a/htdocs/salaries/card.php
+++ b/htdocs/salaries/card.php
@@ -554,7 +554,7 @@ if ($action == 'create') {
 	print '<tr><td>';
 	print $form->editfieldkey('Amount', 'amount', '', $object, 0, 'string', '', 1).'</td><td>';
 	print '<input name="amount" id="amount" class="minwidth75 maxwidth100" value="'.GETPOST("amount").'">&nbsp;';
-	print '<button class="dpInvisibleButtons" id="updateAmountWithLastSalary" name="_useless" type="button">'.$langs->trans('UpdateAmountWithLastSalary').'</a>';
+	print '<button class="dpInvisibleButtons datenow" id="updateAmountWithLastSalary" name="_useless" type="button">'.$langs->trans('UpdateAmountWithLastSalary').'</a>';
 	print '</td>';
 	print '</tr>';