Module documentation.
diff --git a/docs/hazmat/primitives/interfaces.rst b/docs/hazmat/primitives/interfaces.rst
index f37dbb5..7068316 100644
--- a/docs/hazmat/primitives/interfaces.rst
+++ b/docs/hazmat/primitives/interfaces.rst
@@ -9,7 +9,7 @@
this information to influence their operation. Interfaces should also be used
to document argument and return types.
-.. _`Abstract Base Classes`: http://www.python.org/dev/peps/pep-3119/
+.. _`Abstract Base Classes`: http://docs.python.org/3.2/library/abc.html
Cipher Modes