gnupic: Thread: Parametric #defines

Hi!
I'm trying to assemble with gpasm some programs that were developed 
with Microchip's official tools, and I think I've found a feature 
present in Microchip's MPLab but missing in gpasm: parametric 
#defines.

Consider this (useless) program:

-----------------test.asm-----------------
        processor 18F6720
        include p18f6720.inc

#define dummy(p)                p

        org 0x0
        bsf dummy(PORTA),dummy(RA2),A
        end
-----------------test.asm-----------------

I get a syntax error when I assemble that code with gpasm but not when 
I use MPLab:
gpasm -y test.asm
test.asm:7:Error [103] syntax error

This is gpasm-0.13.3 beta as packaged by Debian in an up-to-date 
Debian "Etch" system.

Is there any other syntax for implementing parametric #defines?

Thank's in advance,
-- 
Ing. Fernando J. Rodríguez
SMC Energy S.A.

Serú 52, Mendoza
M5500FNB Mendoza, Argentina
Tel: +54 261 424-5424