AC_DEFINE(TEST) don't work... -- is it OK?

[zaufi]

Hi all!

I found this strange behaviour when try to make libmcrypt support in my test 
project.
I make a test config.in like this:
AC_INIT([test],[1.0])
AC_CONFIG_HEADER([config.h])
AC_DEFINE(TEST)
AC_OUTPUT

and autoheader fail on this with the following error:
autoheader: missing template: TEST
Use AC_DEFINE([TEST], [], [Description])

but manual says that AC_DEFINE with 1 argument is valid call (and I think so)