Negative numbers with exponents in RPN

[JimmysLimeade]

I recently switched from a TI-Nspire to HP Prime after the former got stolen from my car. As such I am learning how to use RPN and I have been trying to figure out how I would execute something like this in RPN
-2^2

When I try this:
2
+/-
x^2
it gives me 4 which is essentially (-2)^2 and not -2^2 which would come out as -4

Am I doing something wrong or is it not possible on RPN to do -2^2?