How to use rdiff-backup with unicode file names?

I am using rdiff-backup to backup Windows Server 2012 to a Raspberry Pi.

Raspberry Pi has a USB-attached 2TB NTFS drive.

In general all works well: Except when rdiff-backup comes across folders with french accents (e.g è) in the name, in which point it fails with:

Making directory /data/Am▒lie
Sending back exception [Errno 84] Invalid or incomplete multibyte or wide character: '/data/Am\xe9lie' of type : E

The command I am using, on the Windows Server, is:
rdiff-backup --terminal-verbosity 8 --print-statistics c:\. [email protected]::/media/pi/backupdrive/data

How do I get rdiff-backup to backup folder/filenames with utf-8 encoding?

EDIT: The issue is with the Pi->NTFS drive, not WindowsSever->Pi.
(If I run the same command to an ext4 partition, it works fine)