Static files always show own IP in access.log


My server is using Ubuntu 14.04 + easyengine 3.2.2 + HHVM + pagespeed.

In access log, static files like jpg always just show my ip address. (Web address show visitors ip correctly.)

I think it’s because nginx get the files from mod_pagespeed, so it show the my ip instant of visitors ip.

Is there any way to let access log to show visitors ip?