lexical_cast with unsigned short

If possible, please advise. using lexical cast w/unsigned short fails, on MSVC7: #include <boost\lexical_cast.hpp> #include <iostream> int _tmain(int argc, _TCHAR* argv[]) { std::string aStr("2"); unsigned short i = boost::lexical_cast<unsigned short>(aStr); \\ ERROR! std::cout << i << std::endl; return 0; }