diff --git a/doc/sphinx/4ip_extension.rst b/doc/sphinx/4ip_extension.rst
new file mode 100644
index 0000000000000000000000000000000000000000..af0089acdf8b13db2daa845e5ce52efe42d87448
--- /dev/null
+++ b/doc/sphinx/4ip_extension.rst
@@ -0,0 +1,5 @@
+HTTP 301: Page Moved Permanently
+================================
+
+This does no longer exists. Either you were looking for :ref:`ms33` or for the
+general :ref:`4ip_toc`
diff --git a/doc/sphinx/index.rst b/doc/sphinx/index.rst
index 8e91a0eb1018a95a7a2fadc2df4b302bb471bcf2..a8fe5ef46f6dfbad75e0cb9ec53fc9b8d8898a33 100644
--- a/doc/sphinx/index.rst
+++ b/doc/sphinx/index.rst
@@ -3,6 +3,8 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
+.. _4ip_toc:
+
 Welcome to 4IP-extension documentation!
 =======================================