diff --git a/IPython/parallel/client/client.py b/IPython/parallel/client/client.py
index a7c419f..31862dd 100644
--- a/IPython/parallel/client/client.py
+++ b/IPython/parallel/client/client.py
@@ -804,7 +804,7 @@ class Client(HasTraits):
             msg_type = msg['header']['msg_type']
             handler = self._notification_handlers.get(msg_type, None)
             if handler is None:
-                raise Exception("Unhandled message type: %s"%msg.msg_type)
+                raise Exception("Unhandled message type: %s" % msg_type)
             else:
                 handler(msg)
             idents,msg = self.session.recv(self._notification_socket, mode=zmq.NOBLOCK)
@@ -818,7 +818,7 @@ class Client(HasTraits):
             msg_type = msg['header']['msg_type']
             handler = self._queue_handlers.get(msg_type, None)
             if handler is None:
-                raise Exception("Unhandled message type: %s"%msg.msg_type)
+                raise Exception("Unhandled message type: %s" % msg_type)
             else:
                 handler(msg)
             idents,msg = self.session.recv(sock, mode=zmq.NOBLOCK)