rebuild any statically linked ports

[Don Munyak]

I am following the instructions for keeping my freebsd system upto
date from http://www.taosecurity.com/keeping_...up-to-date.html

After running,

# freebsd-update fetch
# /usr/local/sbin/freebsd-update install

A message states" Don't forget to rebuild any statically linked ports
to use the updated libraries after you install them."

what does this mean and how do I complish rebuilding statically linked ports?

Thanks