[Boost-users] Complie error: 'make_shared’ was not declared in this scope

Hi everyone I meet this error: "class.cpp:89: error: no matching function for call to 'make_shared(const boost::weak_ptrzeitgeist::Core&)' and the code is: *return make_shared(mCore);* I'm using gcc 4.3.1 and boost 1.36.0. I tried to solve the problem by using *shared_ptr<Core>(mCore)* but got a run-time error. Could someone help me?