diff --git a/core/modules/migrate_drupal/config/install/migrate.migration.d6_custom_block.yml b/core/modules/migrate_drupal/config/install/migrate.migration.d6_custom_block.yml
index 37944a5..484a2d6 100644
--- a/core/modules/migrate_drupal/config/install/migrate.migration.d6_custom_block.yml
+++ b/core/modules/migrate_drupal/config/install/migrate.migration.d6_custom_block.yml
@@ -17,7 +17,7 @@ process:
   'body/value': body
 destination:
   plugin: entity:block_content
-  no_stub: 1
+  no_stub: true
 migration_dependencies:
   required:
     - d6_filter_format