  A Bol loop is a loop that satisfies the Bol identity $(xy.z)y=x(yz.y)$. If
$L$ is a loop and $f:L\to L$ is a bijection such that
$f(xy)\in\{f(x)f(y),f(y)f(x)\}$, for every $x$, $y\in L$, then $f$ is called a
half-automorphism of $L$. In this paper, we describe the half-automorphism
group of a class of Bol loops of order $4m$.
