diff --git a/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php b/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php
index 8c563f0..7745772 100644
--- a/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php
+++ b/core/modules/image/src/Plugin/migrate/source/d6/ImageCachePreset.php
@@ -14,7 +14,8 @@
  * Drupal 6 imagecache presets source from database.
  *
  * @MigrateSource(
- *   id = "d6_imagecache_presets"
+ *   id = "d6_imagecache_presets",
+ *   source_provider = "imagecache"
  * )
  */
 class ImageCachePreset extends DrupalSqlBase {