diff --git a/pyopencl/tools.py b/pyopencl/tools.py
index bbb5992781288f941d8c95ea0af1be4910ef084c..b1383cb7b95abe46e22661ba6572e40457b8d6da 100644
--- a/pyopencl/tools.py
+++ b/pyopencl/tools.py
@@ -1,9 +1,6 @@
 """Various helpful bits and pieces without much of a common theme."""
 
-from __future__ import division
-from __future__ import absolute_import
-import six
-from six.moves import zip
+from __future__ import division, absolute_import
 
 __copyright__ = "Copyright (C) 2010 Andreas Kloeckner"
 
@@ -31,6 +28,9 @@ OTHER DEALINGS IN THE SOFTWARE.
 """
 
 
+import six
+from six.moves import zip, intern
+
 import numpy as np
 from decorator import decorator
 import pyopencl as cl