Host Header in HAProxy Log ausgeben

Question

Ich habe in meinem HAProxy Frontend die Zeile

log-format "[owa] %ci host=%[req.hdr(host)] r=\"%r\" status=%ST bytes=%B fe=%f be=%b/%s"

Aber HAProxy sagt

[ALERT]    (431157) : config : Parsing [/etc/haproxy/haproxy.cfg:67]: failed to parse log-format : sample fetch <req.hdr(host)] r="%r" status=%ST bytes=%B fe=%f be=%b/%s> may not be reliably used here because it needs 'HTTP request headers' which is not available here.

Wie kann ich den Host Header im Log anzeigen?