Production cross sections of muons from heavy-flavour hadrondecays as a function of $\pt$ for p-Pb collisions at $\sqrt {s_{\rm NN}}$ = 5.02 TeV at forward rapidity ($2.03 < y_{\rm cms} < 3.53$) and backward rapidity ($-4.46 < y_{\rm cms} < -2.96$). Statistical uncertainties (bars) and systematic uncertainties (boxes) are shown.