1 files changed, 3 insertions, 2 deletions
diff --git a/sphinx/setup_command.py b/sphinx/setup_command.py
index deb8ceabc..029a44c24 100644
--- a/sphinx/setup_command.py
+++ b/sphinx/setup_command.py
@@ -16,10 +16,11 @@ from __future__ import print_function
 import sys
 import os
 import types
-from StringIO import StringIO
 from distutils.cmd import Command
 from distutils.errors import DistutilsOptionError
 
+import six
+
 from sphinx.application import Sphinx
 from sphinx.util.console import darkred, nocolor, color_terminal
 from sphinx.util.osutil import abspath
@@ -141,7 +142,7 @@ class BuildDoc(Command):
             # Windows' poor cmd box doesn't understand ANSI sequences
             nocolor()
         if not self.verbose:
-            status_stream = StringIO()
+            status_stream = six.StringIO()
         else:
             status_stream = sys.stdout
         confoverrides = {}