BLOCKINGMODE=NULL does not exist in pihole-FTL.conf

Hi folks,

Fresh installation.
my pihole-FTL.conf only has one entry:
PRIVACYLEVEL=0

I assume its okay that BLOCKINGMODE=NULL is missing because its default anyway and you just need to have an entry there if you use some thing different than NULL.

But I wanted to make sure that my assumption is correct.

Thanks
Michael