You must supply a valid port for the NAT port entry. Input error in 2.2

[gjaltemba]

In pfsense 2.1.2, I had a Firewall NAT outbound entry which specified NAT port 1024:65535. The entry was
auto created rule for localhost to MYOPENVPN.

I cannot get Pfsense 2.2 to auto create this rule and entering the same rule in pfsense 2.2 manually yields an input error.

You must supply a valid port for the NAT port entry.

What am I missing?

[jimp]

Just leave that port box empty. It's not necessary.

[gjaltemba]

So simple. Thank you for your help.