Add X-Forwarder-For HTTP header to HAProxy

I use HAProxy 1.3.26 on my CentOS 5.8 to proxy all requests to a dedicated server. I use HAProxy just to proxy HTTP and HTTPS to a single server, so no load balancing.

My haproxy.cfg is rather simple:

global
        log 127.0.0.1   local0
        log 127.0.0.1   local1 notice
        maxconn 4096
        user haproxy
        group haproxy
        daemon

defaults
        log global
        option dontlognull
        option httpclose
        option forwardfor
        clitimeout 60000
        srvtimeout 60000
        contimeout 5000
        retries 3
        option redispatch

listen http 192.168.0.1:80
        mode tcp
        option tcplog
        maxconn 10000
        server web01 192.0.1.13:80 maxconn 5000

listen https 192.168.0.1:443
        mode tcp
        maxconn 10000
        server web01 192.0.1.13:443 maxconn 5000

where:

192.168.0.1 - server where HAProxy is installed
192.0.1.13  - server to which HTTP requests are forwarded

I would like to see the clients' IP addresses in my Apache 2.2.3 access logs. This option is usually achieved by adding the HTTP X-Forwarded-For header and then reading it in the web server logs. So, I've added the following lines to httpd.conf:

LogFormat "%h %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\"" combined
LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\"" combined_forwarded
SetEnvIfNoCase X-Forwarded-For "." from_proxy=1
CustomLog logs/access_log combined env=!from_proxy
CustomLog logs/access_log combined_forwarded env=from_proxy

The problem is the only logged IP address is 192.168.0.1 (HAProxy server). I've tried different configurations, read documentation, googled but still can't understand why the clients' IPs are not logged.

I feel like I'm missing something simple, as the configs are very straightforward. Please help to correct the configs if possible.

Thank you for any help.