diff --git a/templates/checkout/form-billing.php b/templates/checkout/form-billing.php
index f2c478248ad..b824e781573 100644
--- a/templates/checkout/form-billing.php
+++ b/templates/checkout/form-billing.php
@@ -11,6 +11,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 	exit; // Exit if accessed directly
 }
 
+/** @global WC_Checkout $checkout */
 ?>
 <div class="woocommerce-billing-fields">
 	<?php if ( WC()->cart->ship_to_billing_address_only() && WC()->cart->needs_shipping() ) : ?>