diff --git a/sphinx/setup_command.py b/sphinx/setup_command.py
index 7999bf591..f7ca7a9d2 100644
--- a/sphinx/setup_command.py
+++ b/sphinx/setup_command.py
@@ -17,6 +17,7 @@ import os
 import types
 from StringIO import StringIO
 from distutils.cmd import Command
+from distutils.errors import DistutilsOptionError
 
 from sphinx.application import Sphinx
 from sphinx.util.console import darkred, nocolor, color_terminal