[Plugin: W3 Total Cache] MFUNC error

I have a question regarding W3 total cache.I turn on page cache (basic),and I want to use MFUNC option with one of my functions.
The code will look something like this:

<!-- mfunc -->
 load_ms_css();
<!--/mfunc -->

Which ‘load_ms_css()’ is a function that included on functions.php.
Im getting a fatal error that ‘load_ms_css’ is not define.
When I used WP Super Cache, I set late_init to 1 so function within functions.php will work as mfunc. is there anything similar with W3 Total Cache ?
Thanks