Line thickness with symbols

[Hoeven, Maarten van der]

Hi list,

I am using a symbol file, with (part of) the symbol definition below.
This is working okay, except the line thickness of this circle is (only)
1 pixel.

Is there a way to make the line thickness more than 1? 

SYMBOL
Name 'emptycircle'
TYPE ELLIPSE
FILLED FALSE
POINTS 1 1 END

Regards,
Maarten