diff --git a/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_cactus.php b/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_cactus.php
new file mode 100644
index 00000000000..f753d8b2fce
--- /dev/null
+++ b/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_cactus.php
@@ -0,0 +1,147 @@
+<?php
+/* Copyright (C) 2005-2008 Laurent Destailleur  <eldy@users.sourceforge.net>
+ * Copyright (C) 2005-2009 Regis Houssin        <regis.houssin@capnetworks.com>
+ * Copyright (C) 2013      Philippe Grand       <philippe.grand@atoo-net.com>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ * or see http://www.gnu.org/
+ */
+
+/**
+ *    	\file       htdocs/core/modules/supplier_order/mod_facture_fournisseur_cactus.php
+ *		\ingroup    commande
+ *		\brief      File containing the Cactus Class of numbering models of suppliers invoices references
+ */
+
+require_once DOL_DOCUMENT_ROOT .'/core/modules/supplier_order/modules_facturefournisseur.php';
+
+
+/**
+ *	Cactus Class of numbering models of suppliers invoices references
+ */
+class mod_facture_fournisseur_cactus extends ModeleNumRefSuppliersInvoices
+{
+	var $version='dolibarr';		// 'development', 'experimental', 'dolibarr'
+	var $error = '';
+	var $nom = 'Cactus';
+	var $prefix='SI';
+
+
+    /**
+     * 	Return description of numbering model
+     *
+     *  @return     string      Text with description
+     */
+    function info()
+    {
+    	global $langs;
+      	return $langs->trans("SimpleNumRefModelDesc",$this->prefix);
+    }
+
+
+    /**
+     * 	Returns a numbering example
+     *
+     *  @return     string      Example
+     */
+    function getExample()
+    {
+        return $this->prefix."1301-0001";
+    }
+
+
+    /**
+     * 	Tests if the numbers already in force in the database do not cause conflicts that would prevent this numbering.
+     *
+     *  @return     boolean     false if conflict, true if ok
+     */
+    function canBeActivated()
+    {
+    	global $conf,$langs;
+
+        $siyymm=''; $max='';
+
+		$posindice=8;
+		$sql = "SELECT MAX(SUBSTRING(ref FROM ".$posindice.")) as max";
+        $sql.= " FROM ".MAIN_DB_PREFIX."facture_fourn";
+		$sql.= " WHERE ref LIKE '".$this->prefix."____-%'";
+        $sql.= " AND entity = ".$conf->entity;
+        $resql=$db->query($sql);
+        if ($resql)
+        {
+            $row = $db->fetch_row($resql);
+            if ($row) { $siyymm = substr($row[0],0,6); $max=$row[0]; }
+        }
+        if (! $siyymm || preg_match('/'.$this->prefix.'[0-9][0-9][0-9][0-9]/i',$siyymm))
+        {
+            return true;
+        }
+        else
+        {
+			$langs->load("errors");
+			$this->error=$langs->trans('ErrorNumRefModel',$max);
+            return false;
+        }
+    }
+
+    /**
+     * 	Return next value
+	 *
+	 *  @param	Societe		$objsoc     Object third party
+	 *  @param  Object		$object		Object
+	 *  @return string      			Value if OK, 0 if KO
+     */
+    function getNextValue($objsoc=0,$object='')
+    {
+        global $db,$conf;
+
+        // D'abord on recupere la valeur max
+        $posindice=8;
+        $sql = "SELECT MAX(SUBSTRING(ref FROM ".$posindice.")) as max";
+        $sql.= " FROM ".MAIN_DB_PREFIX."facture_fourn";
+		$sql.= " WHERE ref like '".$this->prefix."____-%'";
+        $sql.= " AND entity = ".$conf->entity;
+
+        $resql=$db->query($sql);
+        if ($resql)
+        {
+            $obj = $db->fetch_object($resql);
+            if ($obj) $max = intval($obj->max);
+            else $max=0;
+        }
+
+		//$date=time();
+        $date=$object->datec;   // Not always defined
+        if (empty($date)) $date=$object->date;  // Creation date is order date for suppliers orders
+        $yymm = strftime("%y%m",$date);
+        $num = sprintf("%04s",$max+1);
+
+        return $this->prefix.$yymm."-".$num;
+    }
+
+
+    /**
+     * 	Renvoie la reference de facture suivante non utilisee
+     *
+	 *  @param	Societe		$objsoc     Object third party
+	 *  @param  Object	    $object		Object
+     *  @return string      			Texte descripif
+     */
+    function invoice_get_num($objsoc=0,$object='')
+    {
+        return $this->getNextValue($objsoc,$object);
+    }
+}
+
+?>
diff --git a/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php b/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php
index fe4aca4dd7f..72cf50adc60 100644
--- a/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php
+++ b/htdocs/core/modules/supplier_invoice/mod_facture_fournisseur_tulip.php
@@ -130,13 +130,13 @@ class mod_facture_fournisseur_tulip extends ModeleNumRefSuppliersInvoices
 
 
     /**
-     *  Renvoie la reference de commande suivante non utilisee
+     *  Renvoie la reference de facture suivante non utilisee
      *
 	 *  @param	Societe		$objsoc     Object third party
 	 *  @param  Object	    $object		Object
      *  @return string      			Texte descripif
      */
-    function commande_get_num($objsoc=0,$object='')
+    function invoice_get_num($objsoc=0,$object='')
     {
         return $this->getNextValue($objsoc,$object);
     }