_order_shipping is formated to 2 decimal points

The _order_shipping for items is changed to 2 decimal points and it causes the item price to sometimes have a 1 cent increase or decrease in price. Example:

shipping is: 2.01613 and when calculate_shipping function is triggered this value changes to 2.02. The solution would be to:

add_filter('woocommerce_order_get_items', 'xonja_woo_fix_shipping_tax', 1);

function xonja_woo_fix_shipping_tax($items) {
    foreach ($items as $item) {
        /* @var $item WC_Order_Item_Shipping */
        if ($item instanceof WC_Order_Item_Shipping) {
            ($item->set_total(2.01613, 4));
        }
    }
    return $items;
}

but $item->set_total does not accept the second parameter ($dp).
To do this WC_Order_Item_Shipping would need a slight change:

public function set_total( $value, $dp = 2 ) {
		$this->set_prop( 'total', wc_format_decimal( $value, $dp ) );
}

Any body found a work around to this?