How to re-enable the `enable` command?

As part of a script to set up a restricted user, I ran the enable -n enable command. For testing purposes I would like to undo that command but I can't find any documentation on how to do so. I know normally I would just run enable enable, but since that command is disabled that isn't an option. The user in question is chrooted and running rbash, I have superuser access on the device and I have tried things like sudo su -c "enable echo" usernameHere with no success. I know I can always just scrap the user and start again, but I have a feeling that there's a better way that I'm missing, so I would like to avoid deleting the user if possible. Any input and advice would be appreciated!