diff --git a/cowrie/telnet/transport.py b/cowrie/telnet/transport.py
index 0ca0946..a4822b2 100644
--- a/cowrie/telnet/transport.py
+++ b/cowrie/telnet/transport.py
@@ -10,7 +10,7 @@ import uuid
 
 from twisted.python import log
 from twisted.internet import protocol
-from twisted.conch.telnet import AuthenticatingTelnetProtocol, ECHO, \
+from twisted.conch.telnet import AuthenticatingTelnetProtocol, ECHO, TRAPSIG, \
                                  ITelnetProtocol, ProtocolTransportMixin, \
                                  SGA, NAWS, MODE, LINEMODE, TelnetTransport
 from twisted.protocols.policies import TimeoutMixin