  Free Borel $\mathbb{R}^{d}$-flows are smoothly equivalent if there is a Borel
bijection between the phase spaces that maps orbits onto orbits and is a
$C^{\infty}$-smooth orientation preserving diffeomorphism between orbits. We
show that all free non-tame Borel $\mathbb{R}^{d}$-flows are smoothly
equivalent in every dimension $d \ge 2$. This answers a question of B. Miller
and C. Rosendal.
