diff --git a/source/compat.txt b/source/compat.txt
index 74b498fa089b158ad677bbcd542b53c541a4f1af_c291cmNlL2NvbXBhdC50eHQ=..c1910731af5a7767e8a31b380b6222538439c412_c291cmNlL2NvbXBhdC50eHQ= 100644
--- a/source/compat.txt
+++ b/source/compat.txt
@@ -69,5 +69,7 @@
 
   won't work.
 
+A more complete list is available at `our dev site`_.
+
 .. _`CPython C API`: http://docs.python.org/c-api/
 .. _`standard library modules`: http://docs.python.org/library/
@@ -72,2 +74,3 @@
 .. _`CPython C API`: http://docs.python.org/c-api/
 .. _`standard library modules`: http://docs.python.org/library/
+.. _`our dev site`: http://codespeak.net/pypy/dist/pypy/doc/cpython_differences.html