diff -r af4387d8d1c7 -r 633cd0c46e6a mercurial/dispatch.py
--- a/mercurial/dispatch.py	Thu Feb 14 13:56:02 2013 -0600
+++ b/mercurial/dispatch.py	Tue Feb 12 22:15:31 2013 +0100
@@ -334,7 +334,7 @@
         self.cmdname = cmd = args.pop(0)
         args = map(util.expandpath, args)
 
-        for invalidarg in ("--cwd", "-R", "--repository", "--repo"):
+        for invalidarg in ("--cwd", "-R", "--repository", "--repo", "--config"):
             if _earlygetopt([invalidarg], args):
                 def fn(ui, *args):
                     ui.warn(_("error in definition for alias '%s': %s may only "