diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 0630d2df6a4..948e1c01deb 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -2354,14 +2354,6 @@ class FactureFournisseur extends CommonInvoice
 			$info_bits = 0;
 		}
 
-		if ($idproduct) {
-			$product = new Product($this->db);
-			$result = $product->fetch($idproduct);
-			$product_type = $product->type;
-		} else {
-			$product_type = $type;
-		}
-
 		//Fetch current line from the database and then clone the object and set it in $oldline property
 		$line = new SupplierInvoiceLine($this->db);
 		$line->fetch($id);
@@ -2369,6 +2361,15 @@ class FactureFournisseur extends CommonInvoice
 
 		$staticline = clone $line;
 
+		if ($idproduct) {
+			$product = new Product($this->db);
+			$result = $product->fetch($idproduct);
+			$product_type = $product->type;
+		} else {
+			$idproduct = $staticline->fk_product;
+			$product_type = $type;
+		}
+
 		$line->oldline = $staticline;
 		$line->context = $this->context;