diff --git a/doc/en/customize.txt b/doc/en/customize.txt
index ab7cda79f..bea6f1dee 100644
--- a/doc/en/customize.txt
+++ b/doc/en/customize.txt
@@ -130,4 +130,4 @@ Builtin configuration file options
 .. confval:: doctest_optionflags
 
    One or more doctest flag names from the standard ``doctest`` module.
-   `See how py.test handles doctests <doctest.html>`_.
+   :doc:`See how py.test handles doctests <doctest>`.