diff --git a/ChangeLog b/ChangeLog
index ee9b1c94490..3abb0d53fb4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -47,6 +47,7 @@ For developers:
 - New: Add trigger DON_UPDATE, DON_DELETE
 - New: Add country iso code on 3 chars into table of countries.
 - Qual: Removed hard coded rowid into data init of table llx_c_action_trigger.     
+- New: [ Task #1481 ] Add trigger BILL_SUPPLIER_MODIFY.
 
 WARNING: Following change may create regression for some external modules, but was necessary to make
 Dolibarr better:
diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index b01e3ee7891..323d8cb9c47 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -601,11 +601,9 @@ class FactureFournisseur extends CommonInvoice
         {
             if (! $notrigger)
             {
-                // Call triggers
-                //include_once DOL_DOCUMENT_ROOT . '/core/class/interfaces.class.php';
-                //$interface=new Interfaces($this->db);
-                //$result=$interface->run_triggers('BILL_SUPPLIER_MODIFY',$this,$user,$langs,$conf);
-                //if ($result < 0) { $error++; $this->errors=$interface->errors; }
+                // Call trigger
+                $result=$this->call_trigger('BILL_SUPPLIER_MODIFY',$user);
+                if ($result < 0) $error++;            
                 // End call triggers
             }
         }