diff --git a/src/lib/subtl/subtl.py b/src/lib/subtl/subtl.py
index bf6acad1..f53432cf 100644
--- a/src/lib/subtl/subtl.py
+++ b/src/lib/subtl/subtl.py
@@ -1,6 +1,7 @@
 '''
 Based on the specification at http://bittorrent.org/beps/bep_0015.html
 '''
+import binascii
 import random
 import struct
 import time