diff --git a/nova/api/openstack/compute/routes.py b/nova/api/openstack/compute/routes.py
index 5b1eeefe8b..91f068daef 100644
--- a/nova/api/openstack/compute/routes.py
+++ b/nova/api/openstack/compute/routes.py
@@ -94,7 +94,7 @@ def _create_controller(main_controller, action_controller_list):
 
     controller = wsgi.Resource(main_controller())
     for ctl in action_controller_list:
-        controller.register_actions(ctl())
+        controller.register_subcontroller_actions(ctl())
     return controller
 
 
diff --git a/nova/api/openstack/wsgi.py b/nova/api/openstack/wsgi.py
index 271ce5d313..1ef8e962b2 100644
--- a/nova/api/openstack/wsgi.py
+++ b/nova/api/openstack/wsgi.py
@@ -396,8 +396,8 @@ class Resource(wsgi.Application):
         """:param controller: object that implement methods created by routes
                               lib
         """
-
         self.controller = controller
+        self.sub_controllers = []
 
         self.default_serializers = dict(json=JSONDictSerializer)
 
@@ -413,6 +413,13 @@ class Resource(wsgi.Application):
         for key, method_name in actions.items():
             self.wsgi_actions[key] = getattr(controller, method_name)
 
+    def register_subcontroller_actions(self, sub_controller):
+        """Registers sub-controller actions with this resource."""
+        self.sub_controllers.append(sub_controller)
+        actions = getattr(sub_controller, 'wsgi_actions', {})
+        for key, method_name in actions.items():
+            self.wsgi_actions[key] = getattr(sub_controller, method_name)
+
     def get_action_args(self, request_environment):
         """Parse dictionary created by routes library."""