I'm mounting a USB flash drive and want it to be mounted as UTF-8.

In /etc/fstab I have
/dev/sda1     /media/sda1    auto    auto,umask=000,noatime,iocharset=utf8,codepage=932       0   0
yet, when I plug it in, mount says
/dev/sda1 on /media/sda1 type vfat (rw,sync,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1)
On my debian notebook I have the same fstab line and it mounts as UTF-8 no prob.

What could be the problem?