diff --git a/Lib/distutils/command/config.py b/Lib/distutils/command/config.py
index 43a8dc8..f2ebe37 100644
--- a/Lib/distutils/command/config.py
+++ b/Lib/distutils/command/config.py
@@ -12,7 +12,7 @@
 __revision__ = "$Id$"
 
 import sys, os, string, re
-from types import *
+
 from distutils.core import Command
 from distutils.errors import DistutilsExecError
 from distutils.sysconfig import customize_compiler
@@ -68,19 +68,18 @@
     def finalize_options(self):
         if self.include_dirs is None:
             self.include_dirs = self.distribution.include_dirs or []
-        elif type(self.include_dirs) is StringType:
-            self.include_dirs = string.split(self.include_dirs, os.pathsep)
+        elif isinstance(self.include_dirs, str):
+            self.include_dirs = self.include_dirs.split(os.pathsep)
 
         if self.libraries is None:
             self.libraries = []
-        elif type(self.libraries) is StringType:
+        elif isinstance(self.libraries, str):
             self.libraries = [self.libraries]
 
         if self.library_dirs is None:
             self.library_dirs = []
-        elif type(self.library_dirs) is StringType:
-            self.library_dirs = string.split(self.library_dirs, os.pathsep)
-
+        elif isinstance(self.library_dirs, str):
+            self.library_dirs = self.library_dirs.split(os.pathsep)
 
     def run (self):
         pass
diff --git a/Lib/distutils/tests/test_config_cmd.py b/Lib/distutils/tests/test_config_cmd.py
index af16d4c..45d480b 100644
--- a/Lib/distutils/tests/test_config_cmd.py
+++ b/Lib/distutils/tests/test_config_cmd.py
@@ -46,6 +46,21 @@
         match = cmd.search_cpp(pattern='command', body='// xxx')
         self.assertEquals(match, 1)
 
+    def test_finalize_options(self):
+        # finalize_options does a bit of transformation
+        # on options
+        pkg_dir, dist = self.create_dist()
+        cmd = config(dist)
+        cmd.include_dirs = 'one%stwo' % os.pathsep
+        cmd.libraries = 'one'
+        cmd.library_dirs = 'three%sfour' % os.pathsep
+        cmd.ensure_finalized()
+
+        self.assertEquals(cmd.include_dirs, ['one', 'two'])
+        self.assertEquals(cmd.libraries, ['one'])
+        self.assertEquals(cmd.library_dirs, ['three', 'four'])
+
+
 def test_suite():
     return unittest.makeSuite(ConfigTestCase)