SSL Client authentication error

I had done this before but I forgotten about SSL client authentication with Apache so I enabled it and found that if you don't present a certificate with Apache 2.0.59 and Mod_SSL 2.0 it will throw this very interesting error at you:

Happens in IE and Netscape, the latter reporting 'Could not connect because
of unknown SSL error -12227'.

This is a result of not being able to complete the SSL handshake