diff --git a/doc/usage/configuration.rst b/doc/usage/configuration.rst
index 4c139695e..7fc09c037 100644
--- a/doc/usage/configuration.rst
+++ b/doc/usage/configuration.rst
@@ -781,7 +781,7 @@ documentation on :ref:`intl` for details.
    i18n additionally. You can specify below names:
 
    :index: index terms
-   :literal-block: literal blocks: ``::`` and ``code-block``.
+   :literal-block: literal blocks (``::`` annotation and ``code-block`` directive)
    :doctest-block: doctest block
    :raw: raw content
    :image: image/figure uri and alt