diff --git a/admin_manual/configuration_server/occ_command.rst b/admin_manual/configuration_server/occ_command.rst
index 7277df429..6dc078e9e 100644
--- a/admin_manual/configuration_server/occ_command.rst
+++ b/admin_manual/configuration_server/occ_command.rst
@@ -840,7 +840,7 @@ or to use in a bug report::
 
 Before completing the upgrade, ownCloud first runs a simulation by 
 copying all database tables to new tables, and then performs the 
-upgrade on them, to ensure that the upgrade will complete correctly. This 
+upgrade on them, to ensure that the upgrade will complete correctly. The copied tables are deleted after the upgrade. This 
 takes twice as much time, which on large installations can be many hours, so 
 you can omit this step with the ``--skip-migration-test`` option::