diff --git a/htdocs/includes/modules/facture/neptune/neptune.modules.php b/htdocs/includes/modules/facture/neptune/neptune.modules.php
new file mode 100644
index 00000000000..275eaa8668d
--- /dev/null
+++ b/htdocs/includes/modules/facture/neptune/neptune.modules.php
@@ -0,0 +1,50 @@
+<?PHP
+/* Copyright (C) 2003 Rodolphe Quiedeville <rodolphe@quiedeville.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * or see http://www.gnu.org/
+ *
+ * $Id$
+ * $Source$
+ *
+ */
+
+function facture_get_num($objsoc=0)
+{ 
+  global $db;
+
+  $sql = "SELECT count(*) FROM llx_facture WHERE fk_statut > 0";
+
+  if ( $db->query($sql) ) 
+    {
+      $row = $db->fetch_row(0);
+      
+      $num = $row[0];
+    }
+
+  if (!defined("FACTURE_NEPTUNE_DELTA"))
+    {
+      define("FACTURE_NEPTUNE_DELTA", 0);
+    }
+
+  $num = $num + FACTURE_NEPTUNE_DELTA;
+
+  $y = strftime("%y",time());
+
+  return  "FA" . "$y" . substr("000".$num, strlen("000".$num)-4,4);
+
+}
+
+?>