Index: integral_wrapper.hpp =================================================================== RCS file: /cvsroot/boost/boost/boost/mpl/aux_/integral_wrapper.hpp,v retrieving revision 1.7 retrieving revision 1.8 diff -r1.7 -r1.8 82c82 < operator AUX_WRAPPER_VALUE_TYPE() const { return this->value; } --- > operator AUX_WRAPPER_VALUE_TYPE() const { return static_cast(this->value); }