diff --git a/htdocs/core/class/discount.class.php b/htdocs/core/class/discount.class.php
index dfdac04b9a4..5cd03e46f74 100644
--- a/htdocs/core/class/discount.class.php
+++ b/htdocs/core/class/discount.class.php
@@ -339,7 +339,7 @@ class DiscountAbsolute extends CommonObject
 			include_once DOL_DOCUMENT_ROOT.'/compta/facture/class/facture.class.php';
 			$tmpinvoice = new Facture($this->db);
 			$tmpinvoice->fetch($this->fk_facture_source);
-			$userid = $tmpinvoice->fk_user_author; // We use the author of invoice
+			$userid = $tmpinvoice->user_creation_id; // We use the author of invoice
 		}
 
 		// Insert request