diff --git a/management/univention-management-console-frontend/univention-management-console-web-server b/management/univention-management-console-frontend/univention-management-console-web-server
index 201d506..9853232 100755
--- a/management/univention-management-console-frontend/univention-management-console-web-server
+++ b/management/univention-management-console-frontend/univention-management-console-web-server
@@ -703,6 +703,9 @@ class Ressource(object):
 		sessionid = self.get_session_id()
 		if sessionid:
 			self.sessions.pop(sessionid, None)
+			client = self.get_session()
+			if client:
+				client._timed_out()
 			UMCP_Dispatcher.cleanup_session(sessionid)
 			self.set_cookies(('UMCSessionId', ''), expires=datetime.datetime.fromtimestamp(0))