SSL-Inspection for IPS

Hi all,

I have question regarding the IPS module. As you can see in the post below (Chapter 3) in Fortigate firmware 5.2 there was an automatic option that when IPS on a policy is activated also SSL-Inspection got activated.

http://cookbook.fortinet.com/protecting-web-server/

Now my question: I have a Fortigate firewall with firmware 5.4 now and when I activate IPS on a policy SSL inspection stays off. 

Is SSL Inspection automatically activated in the background or should I have to enable SSL Inspection as well to ensure the IPS module is able to look into all encrypted traffic.

Cheers,

Max