diff --git a/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php b/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php
index 24532b86e35..08994e3853d 100644
--- a/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php
+++ b/htdocs/accountancy/bookkeeping/thirdparty_lettering_customer.php
@@ -103,7 +103,7 @@ if ($action == 'lettering') {
 
 if ($action == 'autolettrage') {
 
-	$result = $lettering->lettering_thirdparty($socid);
+	$result = $lettering->letteringThirdparty($socid);
 
 	if ($result < 0) {
 		setEventMessages('', $lettering->errors, 'errors');
diff --git a/htdocs/accountancy/bookkeeping/thirdparty_lettering_supplier.php b/htdocs/accountancy/bookkeeping/thirdparty_lettering_supplier.php
index 6fdc5a26452..0da446301c6 100644
--- a/htdocs/accountancy/bookkeeping/thirdparty_lettering_supplier.php
+++ b/htdocs/accountancy/bookkeeping/thirdparty_lettering_supplier.php
@@ -104,7 +104,7 @@ if ($action == 'lettering') {
 
 if ($action == 'autolettrage') {
 
-	$result = $lettering->lettering_thirdparty($socid);
+	$result = $lettering->letteringThirdparty($socid);
 
 	if ($result < 0) {
 		setEventMessages('', $lettering->errors, 'errors');
@@ -266,7 +266,7 @@ if ($resql) {
 
 	print "</table>";
 
-	print '<input class="butAction" type="submit" value="lettering" name="lettering" id="lettering">';
+	print '<a class="butAction" href="'.$_SERVER["PHP_SELF"].'?socid=' . $object->id . '&action=lettering">'.$langs->trans('AccountancyLettering').'</a>';
 	//print '<a class="butAction" href="'.$_SERVER["PHP_SELF"].'?socid=' . $object->id . '&action=autolettrage">'.$langs->trans('AccountancyAutoLettering').'</a>';
 	print "</form>";
 	$db->free($resql);
diff --git a/htdocs/accountancy/class/lettering.class.php b/htdocs/accountancy/class/lettering.class.php
index 220ed24d5d6..488941cbc02 100644
--- a/htdocs/accountancy/class/lettering.class.php
+++ b/htdocs/accountancy/class/lettering.class.php
@@ -32,12 +32,12 @@ include_once DOL_DOCUMENT_ROOT . "/core/lib/date.lib.php";
 class lettering extends BookKeeping
 {
 	/**
-	 * lettering_thirdparty
+	 * letteringThirdparty
 	 *
 	 * @param int $socid Thirdparty id
 	 * @return int 1 OK, <0 error
 	 */
-	public function lettering_thirdparty($socid)
+	public function letteringThirdparty($socid)
 	{
 		global $conf;