diff --git a/AUTHORS b/AUTHORS
index ad5b9f8..258eadd 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1 +1,2 @@
-Jannis Leidel
\ No newline at end of file
+Jannis Leidel <jannis@leidel.info>
+Martin Mahner <martin@mahner.org>
diff --git a/MANIFEST.in b/MANIFEST.in
index a63229b..90fe85a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,6 @@
+include AUTHORS
 include LICENSE
+include buildout.cfg
+include buildout.py
 recursive-include src/authority/templates/authority *
 recursive-include src/authority/templates/admin *
diff --git a/src/authority/views.py b/src/authority/views.py
index 2271784..9583f38 100644
--- a/src/authority/views.py
+++ b/src/authority/views.py
@@ -27,7 +27,7 @@ def add_permission(request, app_label, module_name, pk, extra_context={},
         return HttpResponseForbidden(next)
     model = get_model(app_label, module_name)
     if model is None:
-        return HttpResponseRedirect(next)
+        return permission_denied(request)
     obj = get_object_or_404(model, pk=pk)
     form = UserPermissionForm(data=request.POST, obj=obj,
                               perm=codename, initial={'codename': codename})