For loop condition to stop at 0 when using unsigned integers?

I have a loop that has to go from N to 0 (inclusively). My i variable is of type size_t which is usually unsigned. I am currently using the following code:

for (size_t i = N; i != (size_t) -1; --i) {
    ...
}

Is that correct? Is there a better way to handle the condition?

Thanks,

Vincent.