diff --git a/openerp/http.py b/openerp/http.py
index 481aed04c0f..23c677f0620 100644
--- a/openerp/http.py
+++ b/openerp/http.py
@@ -532,11 +532,11 @@ def routing_map(modules, nodb_only, converters=None):
             for mk, mv in members:
                 if inspect.ismethod(mv) and hasattr(mv, 'routing'):
                     routing = dict(type='http', auth='user', methods=None, routes=None)
+                    methods_done = list()
                     for claz in reversed(mv.im_class.mro()):
                         fn = getattr(claz, mv.func_name, None)
-                        if fn and hasattr(fn, 'routing') and '__done__' not in fn.routing:
-                            if not nodb_only:
-                                fn.routing['__done__'] = True
+                        if fn and hasattr(fn, 'routing') and fn not in methods_done:
+                            methods_done.append(fn)
                             routing.update(fn.routing)
                     if not nodb_only or nodb_only == (routing['auth'] == "none"):
                         assert routing['routes'], "Method %r has not route defined" % mv