diff --git a/magnum/common/rpc_service.py b/magnum/common/rpc_service.py
index eaf9729cd0..654ba3c411 100644
--- a/magnum/common/rpc_service.py
+++ b/magnum/common/rpc_service.py
@@ -55,7 +55,6 @@ CONF.register_opts(periodic_opts)
 
 
 class Service(service.Service):
-    _server = None
 
     def __init__(self, topic, server, handlers):
         super(Service, self).__init__()