diff --git a/doc/usage/configuration.rst b/doc/usage/configuration.rst
index 3d59d2e89..6a3b19da4 100644
--- a/doc/usage/configuration.rst
+++ b/doc/usage/configuration.rst
@@ -1196,6 +1196,8 @@ that use Sphinx's HTMLWriter class.
    A text for prepended to the type hint for the return type of a function or
    method.  HTML tags are allowed.  Default: an arrow; ``→``
 
+   .. versionadded:: 4.1
+
 .. confval:: html_sidebars
 
    Custom sidebar templates, must be a dictionary that maps document names to