diff --git a/src/models/ShippingMethodOption.php b/src/models/ShippingMethodOption.php
index 7e270bc8a1..766f58ad6f 100644
--- a/src/models/ShippingMethodOption.php
+++ b/src/models/ShippingMethodOption.php
@@ -42,6 +42,7 @@ class ShippingMethodOption extends ShippingMethod
 
     /**
      * @var ?ShippingMethodInterface
+     * @since 4.3.1
      */
     public ?ShippingMethodInterface $shippingMethod = null;