diff --git a/doc/conffile.rst b/doc/conffile.rst
index 90f5f7a0b..d4d6672e0 100644
--- a/doc/conffile.rst
+++ b/doc/conffile.rst
@@ -23,3 +23,5 @@ You can change the following configuration settings (must be under the ``[ownClo
 - ``maxLogLines`` (default:  ``20000``) -- Specifies the maximum number of log lines displayed in the log window.
 
 - ``chunkSize`` (default:  ``5242880``) -- Specifies the chunk size of uploaded files in bytes.
+
+- ``promptDeleteAllFiles`` (default:  ``true``) -- If a UI prompt should ask for confirmation if it was detected that all files and folders were deleted.
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