diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index ea1bf8d16ca..f60e942f878 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -849,7 +849,7 @@ class FactureFournisseur extends CommonInvoice
 	 * 	@param	string	$ref_ext	External reference of invoice
 	 *  @return int  	   			Return integer <0 if KO, >0 if OK, 0 if not found
 	 */
-	public function fetch($id = '', $ref = '', $ref_ext = '')
+	public function fetch($id = 0, $ref = '', $ref_ext = '')
 	{
 		if (empty($id) && empty($ref) && empty($ref_ext)) {
 			return -1;
@@ -2069,7 +2069,7 @@ class FactureFournisseur extends CommonInvoice
 	 *  @param    	int		$fk_remise_except	Id discount used
 	 *	@return    	int             			>0 if OK, <0 if KO
 	 */
-	public function addline($desc, $pu, $txtva, $txlocaltax1, $txlocaltax2, $qty, $fk_product = 0, $remise_percent = 0, $date_start = '', $date_end = '', $ventil = 0, $info_bits = '', $price_base_type = 'HT', $type = 0, $rang = -1, $notrigger = 0, $array_options = 0, $fk_unit = null, $origin_id = 0, $pu_devise = 0, $ref_supplier = '', $special_code = '', $fk_parent_line = 0, $fk_remise_except = 0)
+	public function addline($desc, $pu, $txtva, $txlocaltax1, $txlocaltax2, $qty, $fk_product = 0, $remise_percent = 0, $date_start = '', $date_end = '', $ventil = 0, $info_bits = '', $price_base_type = 'HT', $type = 0, $rang = -1, $notrigger = 0, $array_options = [], $fk_unit = null, $origin_id = 0, $pu_devise = 0, $ref_supplier = '', $special_code = '', $fk_parent_line = 0, $fk_remise_except = 0)
 	{
 		global $langs, $mysoc, $conf;
 
@@ -2332,7 +2332,7 @@ class FactureFournisseur extends CommonInvoice
 	 * @param	integer	$rang	line rank
 	 * @return    	int           					Return integer <0 if KO, >0 if OK
 	 */
-	public function updateline($id, $desc, $pu, $vatrate, $txlocaltax1 = 0, $txlocaltax2 = 0, $qty = 1, $idproduct = 0, $price_base_type = 'HT', $info_bits = 0, $type = 0, $remise_percent = 0, $notrigger = 0, $date_start = '', $date_end = '', $array_options = 0, $fk_unit = null, $pu_devise = 0, $ref_supplier = '', $rang = 0)
+	public function updateline($id, $desc, $pu, $vatrate, $txlocaltax1 = 0, $txlocaltax2 = 0, $qty = 1, $idproduct = 0, $price_base_type = 'HT', $info_bits = 0, $type = 0, $remise_percent = 0, $notrigger = 0, $date_start = '', $date_end = '', $array_options = [], $fk_unit = null, $pu_devise = 0, $ref_supplier = '', $rang = 0)
 	{
 		global $mysoc, $langs;