PISCO V-band photometry of AK For, when taken simultaneously with CORALIE observations in February 2013, which is phase-folded with the orbital period. For each night, squares mark the average values, their error is 2 mmag (size of symbols), and the dispersion is 9 mmag; corresponding Gaussians are shown to the right. The presence of spots can be deduced from a small but clear fading around phase 0.126, when the spot is presumably well visible. The brightness drop is 0.011 mag relative to the previous night (phase 0.875). The solid line is sine-fitted to data, plotted to guide the eye only, and has no physical meaning.