C++11 lambda returning reference

I have some trouble to return a reference from a lambda. This code works :

std::function<int*(int*)> funct;

funct = [](int *i){
    ++*i;
    return i;
};

int j = 0;
LOG<<*funct(&j)<<j;

Output : 1 1

But not this one :

std::function<int&(int&)> funct;

funct = [](int &i){
    ++i;
    return i;
};

int j = 0;
LOG<<funct(j)<<j;

Building error : C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\type_traits:1441: error: C2440: 'return': cannot convert from 'int' to 'int &'

Any idea why? For me it is the same thing.