RTL_ALT 325m limit?

Hi All

I have found the RTL_ALT limit to 32767 (So it becomes 327 metre) . It cant exceed this limit.
I want this to be 500metre in my Plan.
So devs , Kindly extend the limits of this Parameter so i can do my Mission.

If you have a mission which supposed to end with RTL at 500meter, just add a loiter waypoint before rtl at 500m alt and set rtl alt to 0.