diff --git a/htdocs/bom/bom_card.php b/htdocs/bom/bom_card.php
index b28cf459094..2507f0cfa97 100644
--- a/htdocs/bom/bom_card.php
+++ b/htdocs/bom/bom_card.php
@@ -198,7 +198,7 @@ if (empty($reshook))
 		$error = 0;
 
 		// Set if we used free entry or predefined product
-		$qty = price2num(GETPOST('qty', 'int'));
+		$qty = price2num(GETPOST('qty', 'alpha'));
 		$qty_frozen = GETPOST('qty_frozen', 'int');
 		$disable_stock_change = GETPOST('disable_stock_change', 'int');
 		$efficiency = price2num(GETPOST('efficiency', 'int'));