diff --git a/htdocs/accountancy/admin/index.php b/htdocs/accountancy/admin/index.php
index 8236b83eb3d..385c105451e 100644
--- a/htdocs/accountancy/admin/index.php
+++ b/htdocs/accountancy/admin/index.php
@@ -247,6 +247,20 @@ if ($action == 'setdisablebindingonexpensereports') {
 	}
 }
 
+if ($action == 'setenablelettering') {
+	$setenablelettering = GETPOST('value', 'int');
+	$res = dolibarr_set_const($db, "ACCOUNTING_ENABLE_LETTERING", $setenablelettering, 'yesno', 0, '', $conf->entity);
+	if (!($res > 0)) {
+		$error++;
+	}
+
+	if (!$error) {
+		setEventMessages($langs->trans("SetupSaved"), null, 'mesgs');
+	} else {
+		setEventMessages($langs->trans("Error"), null, 'mesgs');
+	}
+}
+
 
 /*
  * View
@@ -466,6 +480,27 @@ print '</tr>';
 
 print '</table>';
 
+// Lettering params
+print '<table class="noborder centpercent">';
+print '<tr class="liste_titre">';
+print '<td colspan="2">'.$langs->trans('Options').' '.$langs->trans('Lettering').'</td>';
+print "</tr>\n";
+
+print '<tr class="oddeven">';
+print '<td>'.$langs->trans("ACCOUNTING_ENABLE_LETTERING").'</td>';
+if (!empty($conf->global->ACCOUNTING_ENABLE_LETTERING)) {
+	print '<td class="right"><a class="reposition" href="'.$_SERVER['PHP_SELF'].'?token='.newToken().'&action=setenablelettering&value=0">';
+	print img_picto($langs->trans("Activated"), 'switch_on');
+	print '</a></td>';
+} else {
+	print '<td class="right"><a class="reposition" href="'.$_SERVER['PHP_SELF'].'?token='.newToken().'&action=setenablelettering&value=1">';
+	print img_picto($langs->trans("Disabled"), 'switch_off');
+	print '</a></td>';
+}
+print '</tr>';
+
+print '</table>';
+
 print '<div class="center"><input type="submit" class="button button-edit" name="button" value="'.$langs->trans('Modify').'"></div>';
 
 print '</form>';
diff --git a/htdocs/langs/en_US/accountancy.lang b/htdocs/langs/en_US/accountancy.lang
index d2ae1e7f7a1..e988764d8ba 100644
--- a/htdocs/langs/en_US/accountancy.lang
+++ b/htdocs/langs/en_US/accountancy.lang
@@ -336,6 +336,7 @@ NumberOfAccountancyMovements=Number of movements
 ACCOUNTING_DISABLE_BINDING_ON_SALES=Disable binding & transfer in accountancy on sales (customer invoices will not be taken into account in accounting)
 ACCOUNTING_DISABLE_BINDING_ON_PURCHASES=Disable binding & transfer in accountancy on purchases (vendor invoices will not be taken into account in accounting)
 ACCOUNTING_DISABLE_BINDING_ON_EXPENSEREPORTS=Disable binding & transfer in accountancy on expense reports (expense reports will not be taken into account in accounting)
+ACCOUNTING_ENABLE_LETTERING=Enable the lettering function in the accounting
 
 ## Export
 NotExportLettering=Do not export the lettering when generating the file