diff --git a/manual/develop.rst b/manual/develop.rst
index 43b964ffe9..b43a82a6bb 100644
--- a/manual/develop.rst
+++ b/manual/develop.rst
@@ -124,7 +124,7 @@ commits::
 Be careful to not include merges when using ``HEAD~n``.
 
 If you plan to do a lot of development on calibre, then the best method is to create a
-`GitHub <https://github.com>`_ account. Below is a basic guide to setting up
+`GitHub <https://github.com>`__ account. Below is a basic guide to setting up
 your own fork of calibre in a way that will allow you to submit pull requests
 for inclusion into the main calibre repository: