diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 6a6d2ad0fe5..2ad24721e46 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -2914,13 +2914,15 @@ class Facture extends CommonInvoice
                     $sql .= ",'".$bac->code_guichet."'";
                     $sql .= ",'".$bac->number."'";
                     $sql .= ",'".$bac->cle_rib."')";
-                    if ( $this->db->query($sql))
+
+                    dol_syslog(get_class($this)."::demande_prelevement sql=".$sql);
+                    if ($this->db->query($sql))
                     {
                         return 1;
                     }
                     else
-                    {
-                        $this->error=$this->db->error();
+                  {
+                        $this->error=$this->db->lasterror();
                         dol_syslog(get_class($this).'::demandeprelevement Erreur');
                         return -1;
                     }
diff --git a/test/phpunit/FactureTest.php b/test/phpunit/FactureTest.php
index 0301333f481..f0c6539ea8d 100644
--- a/test/phpunit/FactureTest.php
+++ b/test/phpunit/FactureTest.php
@@ -243,6 +243,10 @@ class FactureTest extends PHPUnit_Framework_TestCase
         print __METHOD__." localobject->date_creation=".$localobject->date_creation."\n";
         $this->assertNotEquals($localobject->date_creation, '');
 
+        $result=$localobject->demande_prelevement($user);
+        print __METHOD__." result=".$result."\n";
+       	$this->assertLessThan($result, 0);
+
         return $localobject->id;
     }