Goalkeeper final attacks in corner ?

I must have missed this classic, so how do I get my team goalkeeper joining in on the last ditch attack.
It´s my corner minutes left and I need my goalkeeper to join in on the corner.

How ??

If I assign the goalkeeper to move forward in Tactics/Set pieces/Corners it´s not going to happend on that corner, but perhaps if I get another corner. That might be too late.

Have you tried using the 'take more risks' shout?