Require Message-Authenticator from NAD

Hi,

Due to recent vulnerabilities in radius, we would like to enable Message-Authenticator on our clearpass server.
After enabling this option in clearpass, we get errors in clearpass that the radius packet received from FortiGate-1100E (v7.2.8 build1639 (Mature) is without Message-Authenticator as below.

Is it possible to enable this?

Source RADIUS
Level ERROR
Category Authentication
Action Unknown
Description
Failed to decode RADIUS packet - Received packet from x.x.x.x without Message-Authenticator

TIA :)