sprintf in C, loop never ends

I am having a problem with loop, I don't know why but loop never ends.

int main(int argc, char *argv[])
{
    int j;
    char s[2];
    for(j=1;j<=3;j++)
    {
        sprintf(s,"s%d",j);
        printf("%s", s);
    }
    system("PAUSE");    
    return 0;
}

I think loop should show s1s2s3 in console.