piwik doesn't save HTTP_X_FORWARDED_FOR (no replies)

Hi all,

I'm using piwik 2.13.1 behind apache reverse proxy.

I have set proxy_client_headers[] = HTTP_X_FORWARDED_FOR in [General] section of config.ini.php but in statistics I can see only ip address of reverse proxy.

I used tcpdump on piwik host to see http header and I saw
X-Forwarded-For: xxx.xxx.xxx.xxx (correct ip client address)

So header variable is setted but piwik doesn't save it in visits table.

Can someone help me?
Thanks