diff --git a/src/records/VolumeFolder.php b/src/records/VolumeFolder.php
index cfc8661dc27..f08f95b296f 100644
--- a/src/records/VolumeFolder.php
+++ b/src/records/VolumeFolder.php
@@ -15,7 +15,7 @@
  * Class VolumeFolder record.
  *
  * @property int $id ID
- * @property int $parentId Parent ID
+ * @property int|null $parentId Parent ID
  * @property int $volumeId Volume ID
  * @property string $name Name
  * @property string $path Path