diff --git a/bridge_master.py b/bridge_master.py
index ef1b53f..286473d 100644
--- a/bridge_master.py
+++ b/bridge_master.py
@@ -40,6 +40,7 @@ import re
 import copy
 from setproctitle import setproctitle
 #from crccheck.crc import Crc32
+import hashlib
 
 # Twisted is pretty important, so I keep it separate
 from twisted.internet.protocol import Factory, Protocol