diff --git a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst
index 7f5756471..bb9d3e923 100644
--- a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst
+++ b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst
@@ -35,7 +35,7 @@ to check whether the current Files app instance is a public share or not, and if
 .. code-block:: JavaScript
 
     import { isPublicShare, getSharingToken } from '@nextcloud/sharing/public'
-    
+
     if (isPublicShare()) {
         console.info('This is a public share with the sharing token: ', getSharingToken())
     }
@@ -73,7 +73,7 @@ Added APIs
 Changed APIs
 ^^^^^^^^^^^^
 
-- TBD
+- Clarify ``OCP\Files\Storage\IStorage::getOwner()`` returns ``string|false``.
 
 Deprecated APIs
 ^^^^^^^^^^^^^^^