diff --git a/commerce_shipping.commerce_package_types.yml b/commerce_shipping.commerce_package_types.yml
index 5830d31..c313693 100644
--- a/commerce_shipping.commerce_package_types.yml
+++ b/commerce_shipping.commerce_package_types.yml
@@ -1,6 +1,6 @@
-default:
-  remote_id: default
-  label: Default
+default_box:
+  remote_id: custom
+  label: 'Default box (1x1x1 mm)'
   dimensions:
     length: 1
     width: 1
diff --git a/src/Plugin/Commerce/PackageType/PackageTypeInterface.php b/src/Plugin/Commerce/PackageType/PackageTypeInterface.php
index 089b4fd..473484f 100644
--- a/src/Plugin/Commerce/PackageType/PackageTypeInterface.php
+++ b/src/Plugin/Commerce/PackageType/PackageTypeInterface.php
@@ -19,7 +19,8 @@ interface PackageTypeInterface {
    * Gets the package type remote ID.
    *
    * @return string
-   *   The package type remote ID.
+   *   The package type remote ID, or "custom" if the package type was not
+   *   predefined by the remote API.
    */
   public function getRemoteId();