diff --git a/htdocs/compta/facture/class/facture-rec.class.php b/htdocs/compta/facture/class/facture-rec.class.php
index f1cae70fec5..2bcd227827e 100644
--- a/htdocs/compta/facture/class/facture-rec.class.php
+++ b/htdocs/compta/facture/class/facture-rec.class.php
@@ -962,7 +962,7 @@ class FactureRec extends CommonInvoice
         if ($this->db->query($sql))
         {
             $this->date_when = $date;
-            if ($increment_nb_gen_done>0) $_facrec->nb_gen_done++;
+            if ($increment_nb_gen_done>0) $this->nb_gen_done++;
             return 1;
         }
         else