Using a template with lambda function pointer [duplicate]

I'm playing around with some C++11 features, and I encountered the following:

#include <iostream>
#include <vector>

template <class T>
void map(std::vector<T>& values, T(*func)(T)) { 
    for (int &value : values) {
        value = func(value);
    }
}

int mul2(int x) {
    return 2*x;
}

auto mul3 = [](int value) {
    return value * 3;
};

int main() {
    std::vector<int> v = { 1,2,3,4,5 };
    map(v, mul3);
    for (auto value : v) {
        std::cout << value << std::endl;
    }
}

using map with mul2 works as expected, but when I use the mul3 function it gives a compilation error. I expected that auto in this case would give me a int function pointer, but it seems that is not the case here. Anybody could explain this behaviour?