diff --git a/src/Validator/Constraints/Checkout/CheckoutAddressTypeValidator.php b/src/Validator/Constraints/Checkout/CheckoutAddressTypeValidator.php
index c4ec074..5b56184 100644
--- a/src/Validator/Constraints/Checkout/CheckoutAddressTypeValidator.php
+++ b/src/Validator/Constraints/Checkout/CheckoutAddressTypeValidator.php
@@ -47,10 +47,10 @@ public function validate(mixed $order, Constraint $constraint): void
     {
         Assert::isInstanceOf($order, OrderInterface::class);
 
-        /** @var CustomerInterface $customer */
+        /** @var CustomerInterface|null $customer */
         $customer = $order->getCustomer();
 
-        if (null == $customer) {
+        if (null === $customer) {
             return;
         }