In yasm, define a string whose contents are equal to a macro argument value

Question

Inside a macro, I'd like to declare a string whose value is equal to the textual value of a macro argument.

For example, I want something like:

%macro foo 1
;; some other stuff that might use %1 unquoted
db "%1",0
%endmacro

foo bar

Which after macro expansion should result in the assembly:

db "bar",0

Which would assemble to the the string "bar" with a trailing null.