Hi, sorry if this is a stupid question but I haven't found an answer in the mail archive. I can hardly believe that it hasn't been asked before. Everywhere in the boost libs I see code like namespace boost { // Just a simple "envelope" for non-type template parameters. Useful // to work around some MSVC deficiencies. template <typename T, T n> struct non_type { }; } The problem is the "typename T" part. MSVC 6 does not compile this, it wants "class T". How do I get around this MSVC deficiency (I have SP 5 installed, at least my admin says so)? Isn't there something like BOOST_TEMPLPAR_TYPENAME_KEYWORD that is defined to be equal to class for MSVC <= 6 (and maybe others) an equal to typename for able compilers? Cheers, Christoph