diff --git a/core/modules/migrate_drupal/config/install/migrate.migration.d6_file.yml b/core/modules/migrate_drupal/config/install/migrate.migration.d6_file.yml
index 419680cdee1e335dd21c8bec01f4c645832bc1a5..a528e6aae79aebce2aaa53ac5af8c9545f447c13 100644
--- a/core/modules/migrate_drupal/config/install/migrate.migration.d6_file.yml
+++ b/core/modules/migrate_drupal/config/install/migrate.migration.d6_file.yml
@@ -20,5 +20,6 @@ process:
   filesize: filesize
   status: status
   changed: timestamp
+  uid: uid
 destination:
   plugin: entity:file
diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php
index f0eedc285fad7b7471a78f280683047b0eb0a70f..68969f13115c9ec772ad66ed09df0c525f60e3d2 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php
@@ -68,6 +68,7 @@ public function testFiles() {
     $this->assertIdentical('39325', $file->getSize());
     $this->assertIdentical('public://image-1.png', $file->getFileUri());
     $this->assertIdentical('image/png', $file->getMimeType());
+    $this->assertIdentical("1", $file->getOwnerId());
     // It is pointless to run the second half from MigrateDrupal6Test.
     if (empty($this->standalone)) {
       return;