diff --git a/docs/index.txt b/docs/index.txt
index 076f9a35..113fba3a 100644
--- a/docs/index.txt
+++ b/docs/index.txt
@@ -1,36 +1,36 @@
 .. _index:
 
 ======================================
 dulwich - Python implementation of Git
 ======================================
 
 Overview
 ========
 
-.. include:: ../README
+.. include:: ../README.md
 
 Documentation
 =============
 
 
 .. toctree::
     :maxdepth: 2
 
     performance
     protocol
 
     tutorial/index
 
 
 Changelog
 =========
 
 .. include:: ../NEWS
 
 Indices and tables
 ==================
 
 * :ref:`genindex`
 * :ref:`modindex`
 * :ref:`search`