Make one monster type susceptible when NoInfighting is on

I have a map where I am using NoInfighting in the map definition. It's doing what I want (i.e. enemies are not infighting and not taking damage from each other's projectile impacts).

However, there is monster that just wanders around effectively as an item of scenery and it too is affected by this. The monster itself has no fighting abilities or anything, but it can just happen to get in the way of an enemy attack and block it. That's also fine, but its a pretty weak thing (only 10 hitpoints) and it looks a bit daft for it to be able to take the full impact of a baron's fireball with impunity.

So, is there any way to force a single actor type to take damage from other monster's projectiles when NoInfighting is active via MAPINFO?

FORCEINFIGHTING flag?

Yes, that's exactly what I was looking for. Works perfectly. I knew there was a simple solution, but I couldn't see it for some reason.

Thank you.