Must I amend NAMESPACE manually to import base constants?

I am writing a package that needs to use The CMD check throws a Note:

Undefined global functions or variables:
Consider adding
importFrom("base", "")
to your NAMESPACE file

I am told not to amend NAMESPACE manually. Is there any way of getting roxygen to do this job?

UPDATE: I tried amending NAMESPACE manually anyway. CMD check then fails with this message:

"Error in asNamespace(ns, base.OK = FALSE) :
operation not allowed on base namespace"

You should be able to import as your other importedd functions using roxygen tag if you already use roxygen2

#' @importFrom base

then document your package (devtools::document()) to update NAMESPACE.