I don't think this change is sufficient.

See mod_pagespeed change:

https://code.google.com/p/modpagespeed/source/diff?spec=svn3187&r=3187&format=side&path=/trunk/src/net/instaweb/apache/apache_rewrite_driver_factory.cc&old_path=/trunk/src/net/instaweb/apache/apache_rewrite_driver_factory.cc&old=3128