  Two measurements of mixing and $CP$ violation in charm decays performed at
the LHCb experiment are presented. The former is a measurement of the mixing
observable $y_{CP}-y_{CP}^{K\pi}$ in two-body $D^0$ decays, while the latter is
a search for direct $CP$ violation in $D^+_{(s)}\rightarrow\eta^{(')}\pi^+$
decays.
