Defrag range ioctl not supported in this kernel, please try without any options

I'm trying to compress my BTRFS filesystem for all the files I added before adding compress=lzo to /etc/fstab. I've booted into a live CD and run the following:

sudo mount /dev/mapper/root /mnt
sudo btrfs filesystem defragment -r -v -clzo /mnt

I get the following output:

ERROR: defrag range ioctl not supported in this kernel, please try without any options.

What has gone wrong and is there a way to fix it? My other BTRFS volumes ran this just fine, but they're not mounted as /.