  We perform a quantum Monte Carlo simulation of the resonating valence bond
wavefunction on a two-dimensional square lattice with periodic boundary
conditions. Using two replicas of the system, we calculate the second Renyi
entropy on a spatial bipartition with a square geometry. Through a finite-size
scaling analysis, we extract the logarithmic correction to the area law due to
the presence of the sharp corners in the entangling surface. We find that the
coefficient of this logarithm is positive with a value of 0.073 for a single
$90^{\circ}$ corner.
