Defining static const integer members in class definition

My understanding is that C++ allows static const members to be defined inside a class so long as it's an integer type.

Why, then, does the following code give me a linker error?

#include <algorithm>
#include <iostream>

class test
{
public:
    static const int N = 10;
};

int main()
{
    std::cout << test::N << "\n";
    std::min(9, test::N);
}

The error I get is:

test.cpp:(.text+0x130): undefined reference to `test::N'
collect2: ld returned 1 exit status

Interestingly, if I comment out the call to std::min, the code compiles and links just fine (even though test::N is also referenced on the previous line).

Any idea as to what's going on?

My compiler is gcc 4.4 on Linux.