diff --git a/htdocs/core/class/commondocgenerator.class.php b/htdocs/core/class/commondocgenerator.class.php
index 6d046645f9a..b593a22210e 100644
--- a/htdocs/core/class/commondocgenerator.class.php
+++ b/htdocs/core/class/commondocgenerator.class.php
@@ -602,7 +602,7 @@ abstract class CommonDocGenerator
             if ($columns != "")
             {
                 $columns = substr($columns, 0, strlen($columns) - 2);
-                $resql = $this->db->query("SELECT $columns FROM " . MAIN_DB_PREFIX . "product_fournisseur_price_extrafields AS ex INNER JOIN " . MAIN_DB_PREFIX . "product_fournisseur_price AS f ON ex.fk_object = f.rowid WHERE f.ref_fourn = '" . $line->ref_fourn . "'");
+                $resql = $this->db->query("SELECT $columns FROM " . MAIN_DB_PREFIX . "product_fournisseur_price_extrafields AS ex INNER JOIN " . MAIN_DB_PREFIX . "product_fournisseur_price AS f ON ex.fk_object = f.rowid WHERE f.ref_fourn = '" . $line->ref_supplier . "'");
                 if ($this->db->num_rows($resql) > 0) {
                     $resql = $this->db->fetch_object($resql);