diff --git a/Models/CollectionMapper.php b/Models/CollectionMapper.php
index a936b8d..1b0a92f 100644
--- a/Models/CollectionMapper.php
+++ b/Models/CollectionMapper.php
@@ -34,8 +34,8 @@ final class CollectionMapper extends MediaMapper
         'sources' => [
             'mapper' => MediaMapper::class, /* mapper of the related object */
             'table'  => 'media_relation', /* table of the related object, null if no relation table is used (many->1) */
-            'dst'    => 'media_relation_dst',
-            'src'    => 'media_relation_src',
+            'external' => 'media_relation_dst',
+            'self'   => 'media_relation_src',
         ],
     ];