diff --git a/lib/wallet.py b/lib/wallet.py
index 82d944ee..ab2abc28 100644
--- a/lib/wallet.py
+++ b/lib/wallet.py
@@ -41,6 +41,7 @@ import json
 import copy
 import re
 import stat
+import errno
 from functools import partial
 from collections import namedtuple, defaultdict