Observed (red dots) and synthetic (solid black lines) spectra of RZ Ari in the region around the Li I 6707.8 Å resonance line. The synthetic spectra were calculated with lithium abundances of log ɛ(Li) = 0.8, 1.2, and 1.6. The dotted blue line is the synthetic spectrum calculated without the contribution of the TiO molecular lines. The best fit is achieved for the log ɛ(Li) = 1.2 ± 0.2 dex.