boost errors

one or more multiply defined symbols found
"public: int __thiscall boost::iostreams::zlib_error::error(void)const " (?error@zlib_error@iostreams@boost@@QBEHXZ) already defined in genieutils.lib(zlib.obj)
"public: static void __cdecl boost::iostreams::zlib_error::check(int)" (?check@zlib_error@iostreams@boost@@SAXH@Z) already defined in genieutils.lib(zlib.obj)
"public: __thiscall boost::iostreams::zlib_error::zlib_error(class boost::iostreams::zlib_error const &)" (??0zlib_error@iostreams@boost@@QAE@ABV012@@Z) already defined in genieutils.lib(zlib.obj)
"protected: __thiscall boost::iostreams::detail::zlib_base::zlib_base(void)" (??0zlib_base@detail@iostreams@boost@@IAE@XZ) already defined in genieutils.lib(zlib.obj)
"protected: __thiscall boost::iostreams::detail::zlib_base::~zlib_base(void)" (??1zlib_base@detail@iostreams@boost@@IAE@XZ) already defined in genieutils.lib(zlib.obj)
"protected: void __thiscall boost::iostreams::detail::zlib_base::before(char const * &,char const *,char * &,char *)" (?before@zlib_base@detail@iostreams@boost@@IAEXAAPBDPBDAAPADPAD@Z) already defined in genieutils.lib(zlib.obj)
"protected: void __thiscall boost::iostreams::detail::zlib_base::after(char const * &,char * &,bool)" (?after@zlib_base@detail@iostreams@boost@@IAEXAAPBDAAPAD_N@Z) already defined in genieutils.lib(zlib.obj)
"protected: int __thiscall boost::iostreams::detail::zlib_base::xdeflate(int)" (?xdeflate@zlib_base@detail@iostreams@boost@@IAEHH@Z) already defined in genieutils.lib(zlib.obj)
"protected: int __thiscall boost::iostreams::detail::zlib_base::xinflate(int)" (?xinflate@zlib_base@detail@iostreams@boost@@IAEHH@Z) already defined in genieutils.lib(zlib.obj)
"protected: void __thiscall boost::iostreams::detail::zlib_base::reset(bool,bool)" (?reset@zlib_base@detail@iostreams@boost@@IAEX_N0@Z) already defined in genieutils.lib(zlib.obj)
"private: void __thiscall boost::iostreams::detail::zlib_base::do_init(struct boost::iostreams::zlib_params const &,bool,void * (__cdecl*)(void *,unsigned int,unsigned int),void (__cdecl*)(void *,void *),void *)" (?do_init@zlib_base@detail@iostreams@boost@@AAEXABUzlib_params@34@_NP6APAXPAXII@ZP6AX22@Z2@Z) already defined in genieutils.lib(zlib.obj)