Templates: template function not playing well with class's template member function

This is a minimal test case of some code that I actually have. It fails when it tries to evaluate a.getResult<B>():

test.cpp: In function 'void printStuff(const A&)':
test.cpp:6: error: expected primary-expression before '>' token
test.cpp:6: error: expected primary-expression before ')' token

The code is:

#include <iostream>

template< class A, class B>
void printStuff( const A& a)
{
    size_t value = a.getResult<B>();
    std::cout << value << std::endl;
}

struct Firstclass {
    template< class X >
    size_t getResult() const {
        X someInstance;
        return sizeof(someInstance);
    }
};

int main(int, char**) {
    Firstclass foo;

    printStuff<Firstclass, short int>(foo);
    printStuff<Firstclass, double>(foo);

    std::cout << foo.getResult< double >() << std::endl;

    return 0;
}

If I comment out the printStuff function and where it's called, the foo.getResult< double >() call compiles fine and does what is expected.

Any idea what's going on? I've been working with extensively templated code for a while and have never encountered anything like this.