  We show that $1+3/\sqrt{2}$ is a point of the Lagrange spectrum $L$ which is
accumulated by a sequence of elements of the complement $M\setminus L$ of the
Lagrange spectrum in the Markov spectrum $M$. In particular, $M\setminus L$ is
not a closed subset of $\mathbb{R}$, so that a question by T. Bousch has a
negative answer.
