diff --git a/flask/blueprints.py b/flask/blueprints.py
index 9c557028..4c756002 100644
--- a/flask/blueprints.py
+++ b/flask/blueprints.py
@@ -144,6 +144,7 @@ class Blueprint(_PackageBoundObject):
         """
         self._got_registered_once = True
         state = self.make_setup_state(app, options, first_registration)
+        [setattr(self, k, getattr(state, k)) for k in ('subdomain', 'url_prefix', 'url_defaults')]
         if self.has_static_folder:
             state.add_url_rule(self.static_url_path + '/<path:filename>',
                                view_func=self.send_static_file,