diff --git a/broker/src/tunneldigger_broker/tunnel.py b/broker/src/tunneldigger_broker/tunnel.py
index 6c9792c..fb58e8c 100644
--- a/broker/src/tunneldigger_broker/tunnel.py
+++ b/broker/src/tunneldigger_broker/tunnel.py
@@ -4,6 +4,7 @@
 import socket
 import struct
 import time
+import errno
 
 from . import l2tp, protocol, network, limits