Divisors computing minimal log discrepancies on lc surfaces

Let $(X\ni x,B)$ be an lc surface germ. If $X\ni x$ is klt, we show that there exists a divisor computing the minimal log discrepancy of $(X\ni x,B)$ that is a Koll'ar component of $X\ni x$. If $B≠0$ or $X\ni x$ is not Du Val, we show that any divisor computing the minimal log discrepancy of $(X\ni x,B)$isapotentiallcplaceof$X\ni x$.