diff --git a/IPython/utils/pickleutil.py b/IPython/utils/pickleutil.py
index 8511ea4..6e0a04d 100644
--- a/IPython/utils/pickleutil.py
+++ b/IPython/utils/pickleutil.py
@@ -18,7 +18,6 @@ __docformat__ = "restructuredtext en"
 import copy
 import logging
 import sys
-from collections import namedtuple
 from types import FunctionType
 
 try: