--- a/mercurial/commands.py	Sun May 06 13:14:58 2012 +0200
+++ b/mercurial/commands.py	Sun May 06 23:58:04 2012 +0900
@@ -3299,7 +3299,8 @@
                        'extensions\n'))
 
     def helpextcmd(name):
-        cmd, ext, mod = extensions.disabledcmd(ui, name, ui.config('ui', 'strict'))
+        cmd, ext, mod = extensions.disabledcmd(ui, name,
+                                               ui.configbool('ui', 'strict'))
         doc = gettext(mod.__doc__).splitlines()[0]
 
         msg = help.listexts(_("'%s' is provided by the following "