diff --git a/source/index.rst b/source/index.rst
index da8b8f1..d19a254 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -24,7 +24,7 @@ To learn more about how it works, see :doc:`Authenticated-session-identifiers`.
 
 For background on why the library improves security, see the blog post `Ramping up ASP.NET session security <http://www.dotnetnoob.com/2013/07/ramping-up-aspnet-session-security.html>`_.
 
-Did you now that the SDL requires countermeasures against session fixation attacks, and that certain security headers must set by your web application? No? See :doc:`` to learn more.
+Did you know that the SDL requires countermeasures against session fixation attacks, and that certain security headers must set by your web application? No? See :doc:`NWebsec-and-the-SDL` to learn more.
 
 Check out the `NWebsec demo site <http://www.nwebsec.com/>`_ to see the headers and session security improvements in action.