diff --git a/setup/build.py b/setup/build.py
index 8c25ff2ea3..13c0e5c82c 100644
--- a/setup/build.py
+++ b/setup/build.py
@@ -10,11 +10,10 @@ __docformat__ = 'restructuredtext en'
 import textwrap, os, shlex, subprocess, glob, shutil, re, sys, json
 from collections import namedtuple
 
-from setup import Command, islinux, isbsd, isfreebsd, isosx, ishaiku, SRC, iswindows, __version__
+from setup import Command, islinux, isbsd, isfreebsd, isosx, ishaiku, SRC, iswindows, __version__, ispy3
 isunix = islinux or isosx or isbsd or ishaiku
 
 py_lib = os.path.join(sys.prefix, 'libs', 'python%d%d.lib' % sys.version_info[:2])
-ispy3 = sys.version_info.major > 2
 
 
 def init_symbol_name(name):