[rdiff-backup-users] multiple directories

[Terry]

I have an include list
more /root/rdiff-inc
/tank/html/terry/public_html
/tank/vexim
/tank/tools

and I try
rdiff-backup --include-filelist /root/rdiff-inc  /usb-drive/rdiff

I get
rdiff-backup --include-filelist /root/rdiff-inc /usb-drive/rdiff/
Fatal Error: Switches missing or wrong number of arguments

at the moment I am trying to figure out the docs

Thanks