diff --git a/doc/config.rst b/doc/config.rst
index 198d8add42..3b20c5a48f 100644
--- a/doc/config.rst
+++ b/doc/config.rst
@@ -1344,6 +1344,8 @@ Server connection settings
     :type: string
     :default: ``''``
 
+    .. versionadded:: 3.5.0
+
     Name of PHP script to be sourced and executed to obtain login
     credentials. This is alternative approach to session based single
     signon. The script has to provide a function called