diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index e2c47968d55..056583a65ad 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -1149,7 +1149,7 @@ class Facture extends CommonObject
 				$this->use_webcal=($conf->global->PHPWEBCALENDAR_BILLSTATUS=='always'?1:0);
 
 				// Appel des triggers
-				include_once(DOL_DOCUMENT_ROOT . "/core/interfaces.class.php");
+				include_once(DOL_DOCUMENT_ROOT . "/core/class/interfaces.class.php");
 				$interface=new Interfaces($this->db);
 				$result=$interface->run_triggers('BILL_PAYED',$this,$user,$langs,$conf);
 				if ($result < 0) { $error++; $this->errors=$interface->errors; }
diff --git a/htdocs/core/class/interfaces.class.php b/htdocs/core/class/interfaces.class.php
index 45532d420e3..e53c9473736 100644
--- a/htdocs/core/class/interfaces.class.php
+++ b/htdocs/core/class/interfaces.class.php
@@ -19,7 +19,7 @@
  */
 
 /**
- *   \file		htdocs/core/interfaces.class.php
+ *   \file		htdocs/core/class/interfaces.class.php
  *   \ingroup		workflow
  *   \brief			Fichier de la classe de gestion des triggers
  *   \version		$Id$