Tailrec compliant Fibonacci seq in Scala

gistfile1.scala

def fib (count: Int): Int = {
  @tailrec def _fib (count: Int, value: Int, accum: Int = 0): Int = count match {
    case 0 => accum
    case _ => _fib(count - 1, accum, value + accum)
  }
  _fib(count, 1)
}