diff --git a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_30.rst b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_30.rst
index 248218492..b7759e330 100644
--- a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_30.rst
+++ b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_30.rst
@@ -193,6 +193,7 @@ Added APIs
 - ``OCP\AppFramework\Bootstrap\IRegistrationContext::registerTaskProcessingProvider()`` was added to allow registering task processing providers
 - ``OCP\AppFramework\Bootstrap\IRegistrationContext::registerTaskProcessingTaskType()`` was added to allow registering task processing task types
 - ``OCP\Files\IRootFolder::getAppDataDirectoryName()`` was added to allow getting the name of the app data directory
+- ``OCP\Security\IHasher::validate()`` should return true if the passed string is a valid hash generated by ``OCP\Security\IHasher::hash()``
 
 Changed APIs
 ^^^^^^^^^^^^