Have shell completion for kssh work the same as ssh #5322

Is your feature request related to a problem? Please describe.
First off, I use zsh.
I would like command completion for kssh work the same as when I use ssh. For instance, when I start typing kssh some.host -i ~/.ssh/ and hit , nothing happens. If I change kssh to ssh then go to the end of the line and hit I get completion for the directories and files under ~/.ssh.

Describe the solution you'd like
Have command completion for kssh work like that of ssh.

I've tried just doing compdef _ssh kssh but that did not help.