You can add this in /etc/fstab or by modifying your filesystem options.
Assuming you have the /home filesystem on /dev/sda, you can do the following:
Modify Filesystem method:
sudo /sbin/tune2fs -o +acl /dev/sda
Modify /etc/fstab method:
/dev/sda /home ext3 defaults,acl 1 2
Using either method, the filesystem has to be remounted to take effect. You can accomplish this by rebooting, or by running
sudo /bin/mount -o remount /home