Index: tg/configuration.py
===================================================================
--- tg/configuration.py	(revision 5791)
+++ tg/configuration.py	(working copy)
@@ -442,7 +442,7 @@
             load_environment(global_conf, app_conf)
             app = TGApp()
             if wrap_app:
-                wrap_app(app)
+                app = wrap_app(app)
             app = self.add_core_middleware(app)
             
             if self.use_toscawidgets: