--- a/mercurial/ui.py	Mon Oct 07 15:21:17 2013 -0700
+++ b/mercurial/ui.py	Wed Oct 09 11:27:59 2013 -0700
@@ -664,7 +664,7 @@
         if not self.interactive():
             return default
         try:
-            self.write(self.label(prompt or _('password: '), 'ui.prompt'))
+            self.write_err(self.label(prompt or _('password: '), 'ui.prompt'))
             return getpass.getpass('')
         except EOFError:
             raise util.Abort(_('response expected'))