wrapping template function and <unresolved overloaded function type

I have problem with my wrapping function.

template <typename Iter, typename SomeFunction>                         
void wrap(Iter first, Iter last, SomeFunction someFunction)
{
  someFunction(first, last);
}

I would like to use it like this:

template <typename Iter>
void fill5(Iter first, Iter last)
{
    fill(first, last, 5); 
}
int main()
{
    vector<int> v(100, -1);
    wrap(v.begin(), v.end(), fill5);

}

But I get

test.cpp: In function ‘int main()’:
test.cpp:16:40: error: no matching function for call to ‘wrap(std::vector<int>::iterator, std::vector<int>::iterator, <unresolved overloaded function type>)’
test.cpp:16:40: note: candidate is:
wrap.h:6:6: note: template<class Iter, class SomeFunction> void wrap(Iter, Iter, someFunction)

I know that if I will call that function like this

wrap(v.begin(), v.end(), fill5< vector<int>::iterator> );

it will compile. But do I always have to do it explicit? It's sucks. Why compiler can't deduce which function will be used? Is there any possibility to write wrap function to take arguments like in the first one?