diff --git a/jmclient/jmclient/blockchaininterface.py b/jmclient/jmclient/blockchaininterface.py
index dbe8f4c..902679f 100644
--- a/jmclient/jmclient/blockchaininterface.py
+++ b/jmclient/jmclient/blockchaininterface.py
@@ -11,6 +11,7 @@ import re
 import sys
 import time
 import traceback
+import binascii
 from decimal import Decimal
 from twisted.internet import reactor, task