diff --git a/Interfaces/GSD/Model/GSDCustomerMapper.php b/Interfaces/GSD/Model/GSDCustomerMapper.php
index 430b733..3b5190d 100644
--- a/Interfaces/GSD/Model/GSDCustomerMapper.php
+++ b/Interfaces/GSD/Model/GSDCustomerMapper.php
@@ -42,7 +42,7 @@ final class GSDCustomerMapper extends DataMapperAbstract
     protected static array $ownsOne = [
         'mainAddress' => [
             'mapper' => GSDAddressMapper::class,
-            'src'    => 'AddressId',
+            'self'   => 'AddressId',
         ],
     ];