An aqueous indium or indium alloy plating bath comprising - a source of indium ions, - an acid, - a source of halide ions, - a surfactant according to formula (I) wherein A is selected from branched or unbranched C 10 -C 15 -alkyl; B is selected from the group consisting of hydrogen and alkyl; m is an integer ranging from 5 to 25; each R is independently from each other selected from hydrogen and methyl; and - a dihydroxybenzene derivative of formula (II) wherein each X is independently selected from fluorine, chlorine, bromine, iodine, alkoxy, and nitro; n is an integer ranging from 1 to 4, and a process for deposition of indium or an indium alloy wherein said bath is used.