Correct small typo in internal link
diff --git a/docs/advanced_foreword.rst b/docs/advanced_foreword.rst
index f7e70a7102..53df8175a2 100644
--- a/docs/advanced_foreword.rst
+++ b/docs/advanced_foreword.rst
@@ -64,6 +64,6 @@ compatible Python code
 <http://lucumr.pocoo.org/2011/1/22/forwards-compatible-python/>`_.
 
 If you do want to dive into Python 3 already have a look at the
-:ref:`python3_support` page.
+:ref:`python3-support` page.
 
 Continue to :ref:`installation` or the :ref:`quickstart`.
