diff --git a/htdocs/facture.class.php b/htdocs/facture.class.php
index 49654c431c7..2d1b6444ab1 100644
--- a/htdocs/facture.class.php
+++ b/htdocs/facture.class.php
@@ -1862,7 +1862,7 @@ class Facture extends CommonObject
             $obj = new $classname();
 
             $numref = "";
-            $numref = $obj->getNumRef($soc,$this->date);
+            $numref = $obj->getNumRef($soc,$this);
 
             if ( $numref != "")
             {
diff --git a/htdocs/includes/modules/facture/orion/orion.modules.php b/htdocs/includes/modules/facture/orion/orion.modules.php
index 33a91899623..ae06feba976 100644
--- a/htdocs/includes/modules/facture/orion/orion.modules.php
+++ b/htdocs/includes/modules/facture/orion/orion.modules.php
@@ -139,11 +139,12 @@ function info()
   
     /**     \brief      Renvoie la référence de commande suivante non utilisée
      *      \param      objsoc      Objet société
+     *      \param      facture		Objet facture
      *      \return     string      Texte descripif
      */
-    function getNumRef($objsoc=0,$date_creation = '')
+    function getNumRef($objsoc=0,$facture)
     {
-        return $this->getNextValue($date_creation);
+        return $this->getNextValue($facture->date);
     }
     
 }    
diff --git a/htdocs/includes/modules/facture/titan/titan.modules.php b/htdocs/includes/modules/facture/titan/titan.modules.php
index 75faebee4fd..d56e53f2562 100644
--- a/htdocs/includes/modules/facture/titan/titan.modules.php
+++ b/htdocs/includes/modules/facture/titan/titan.modules.php
@@ -143,11 +143,12 @@ function info()
   
     /**     \brief      Renvoie la référence de commande suivante non utilisée
      *      \param      objsoc      Objet société
+     *      \param      facture		Objet facture
      *      \return     string      Texte descripif
      */
-    function getNumRef($objsoc=0,$date_creation = '')
+    function getNumRef($objsoc=0,$facture)
     {
-        return $this->getNextValue($date_creation);
+        return $this->getNextValue($facture->date);
     }
     
 }