diff --git a/htdocs/fourn/product/liste.php b/htdocs/fourn/product/liste.php
index 33439ed05fd..d189ea9f343 100644
--- a/htdocs/fourn/product/liste.php
+++ b/htdocs/fourn/product/liste.php
@@ -102,7 +102,7 @@ else
 {
 	if (GETPOST('type'))
 	{
-		$sql .= " AND p.fk_product_type = " . GETPOST('type'));
+		$sql .= " AND p.fk_product_type = " . GETPOST('type','int');
 	}
 	if ($sref)
 	{