We consider two jointly stationary and ergodic random measures $ξ$ and $η$ on $\mathbb{R}^d$ with equal finite intensities, assuming $ξ$ to be diffuse. An allocation is a random mapping taking $\mathbb{R}^d$ to $\mathbb{R}^d\cup\{\infty\}$ in a translation invariant way. We construct allocations transporting the diffuse $ξ$ to arbitrary $η$, under the mild condition of existence of an `auxiliary' point process which is needed only in the case when $η$ is diffuse. When that condition does not hold we show by a counterexample that an allocation transporting $ξ$ to $η$ need not exist.