This small program compiles nicely with g++ 4.6.4 and -std=c++98 and boost 1.52.0: #include <iostream> #include #include std::tr1::tuple f(double x) { return std::tr1::tuple(x, 1.); } int main() { std::cout<' and 'boost::fusion::tuple') I tried to replace and std::tr1::tuple by and boost::tuple without any success. What should I do to have the same code compile with both -std=c++98 and -std=c++11? Regards, Frédéric