  In this note we study when an invariant probability measure lifts to an
invariant measure. Consider a standard Borel space $X$, a Borel probability
measure $\mu$ on $X$, a Borel map $T \colon X \to X$ preserving $\mu$, a
compact metric space $Y$, a continuous map $S\colon Y \to Y$, and a Borel
surjection $p \colon Y \to X$ with $p\circ S = T \circ p$. We prove that if
fibers of $p$ are compact then $\mu$ lifts to an $S$-invariant measure on $Y$.
