The agent used in the built in extinguishers is Halon 1301 so unless you have a stand alone Halon extinguisher (unlikely) you will need an alternative.
See this website for the full list of Halon alternatives:
What is Halon and How Halon Work? Halon 1301 and Halon 1211
You will see that there are many, but CO2 is one of them so that would seem to be the easiest option.