diff --git a/pickleclip/base.py b/pickleclip/base.py
index 46948a3..ab30dbf 100644
--- a/pickleclip/base.py
+++ b/pickleclip/base.py
@@ -4,6 +4,7 @@
 from six.moves import cPickle as pickle
 import dill
 import pyperclip
+import six
 
 
 def copy(obj, protocol=-1, serializer=pickle):