diff --git a/htdocs/product/composition/card.php b/htdocs/product/composition/card.php
index 1fbbe2ecefa..7693ef9a4de 100644
--- a/htdocs/product/composition/card.php
+++ b/htdocs/product/composition/card.php
@@ -66,12 +66,13 @@ if ($id > 0 || ! empty($ref))
 
 if ($cancel) $action ='';
 
-// Action association d'un sousproduit
+// Add subproduct to product
 if ($action == 'add_prod' && ($user->rights->produit->creer || $user->rights->service->creer))
 {
 	$error=0;
 
-	for ($i=0; $i < GETPOST("max_prod", 'int'); $i++)
+	$maxprod = GETPOST("max_prod", 'int');
+	for ($i=0; $i < $maxprod; $i++)
 	{
 		$qty = price2num(GETPOST("prod_qty_".$i, 'alpha'), 'MS');
 		if ($qty > 0)