diff --git a/doc/markup/index.rst b/doc/markup/index.rst
index 9492456d0..ca70b9581 100644
--- a/doc/markup/index.rst
+++ b/doc/markup/index.rst
@@ -3,8 +3,8 @@
 Sphinx Markup Constructs
 ========================
 
-Sphinx adds a lot of new directives and interpreted text roles to standard reST
-markup.  This section contains the reference material for these facilities.
+Sphinx adds a lot of new directives and interpreted text roles to `standard reST
+markup`_.  This section contains the reference material for these facilities.
 
 .. toctree::
 
@@ -15,3 +15,5 @@ markup.  This section contains the reference material for these facilities.
    misc
 
 More markup is added by :ref:`domains`.
+
+.. _standard reST markup: http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html