diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 9d926b3bc98..071b7a3b794 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -5134,16 +5134,18 @@ function get_default_npr(Societe $thirdparty_seller, Societe $thirdparty_buyer,
 
 	if ($idprodfournprice > 0)
 	{
-		if (! class_exists('ProductFournisseur'))
+		if (! class_exists('ProductFournisseur')) {
 			require_once DOL_DOCUMENT_ROOT . '/fourn/class/fournisseur.product.class.php';
+		}
 		$prodprice = new ProductFournisseur($db);
 		$prodprice->fetch_product_fournisseur_price($idprodfournprice);
 		return $prodprice->fourn_tva_npr;
 	}
 	elseif ($idprod > 0)
 	{
-		if (! class_exists('Product'))
+		if (! class_exists('Product')) {
 			require_once DOL_DOCUMENT_ROOT . '/product/class/product.class.php';
+		}
 		$prod = new Product($db);
 		$prod->fetch($idprod);
 		return $prod->tva_npr;
diff --git a/htdocs/fourn/class/fournisseur.product.class.php b/htdocs/fourn/class/fournisseur.product.class.php
index faa681b0e88..786a650efb3 100644
--- a/htdocs/fourn/class/fournisseur.product.class.php
+++ b/htdocs/fourn/class/fournisseur.product.class.php
@@ -499,7 +499,7 @@ class ProductFournisseur extends Product
         $sql.= " pfp.multicurrency_price, pfp.multicurrency_unitprice, pfp.multicurrency_tx, pfp.fk_multicurrency, pfp.multicurrency_code,";
         $sql.="  pfp.barcode, pfp.fk_barcode_type";
         $sql.= " FROM ".MAIN_DB_PREFIX."product_fournisseur_price as pfp";
-        $sql.= " WHERE pfp.rowid = ".$rowid;
+        $sql.= " WHERE pfp.rowid = ".(int) $rowid;
 
         dol_syslog(get_class($this)."::fetch_product_fournisseur_price", LOG_DEBUG);
         $resql = $this->db->query($sql);
diff --git a/htdocs/product/fournisseurs.php b/htdocs/product/fournisseurs.php
index 560f5b1b574..0bda7d44564 100644
--- a/htdocs/product/fournisseurs.php
+++ b/htdocs/product/fournisseurs.php
@@ -254,8 +254,8 @@ if (empty($reshook))
 			{
 				$supplier=new Fournisseur($db);
 				$result=$supplier->fetch($id_fourn);
-				if (isset($_POST['ref_fourn_price_id']))
-					$object->fetch_product_fournisseur_price($_POST['ref_fourn_price_id']);
+				if (GETPOSTISSET('ref_fourn_price_id'))
+					$object->fetch_product_fournisseur_price(GETPOST('ref_fourn_price_id', 'int'));
 
 				$newprice = price2num(GETPOST("price", "alpha"));