Recently, Rodriquez and co‐workers [J. Appl. Phys. 50, 6011 (1979)] reported anomalous photocurrent in reverse‐biased tin oxide/silicon solar cells. We have observed no anomalous photocurrent in our indium tin oxide/silicon semiconductor‐insulator‐semiconductor (SIS) solar cells. In this paper we have offered a possible explanation of why the authors of the above referred paper have observed anomalous photocurrent in tin oxide/silicon solar cells whereas no such effect has been observed in our indium tin oxide/silicon SIS solar cells.