Nikolai Dimidyuk, Rosoboronexport's special programs director, said Indonesia could also buy other Russian warplanes as well as Mi-17 and Mi-35 helicopters.
"Indonesia is still very interested in Russian fixed- and rotary-winged aircraft," he said.
He expressed confidence the Russian Finance Ministry would soon approve a $1 billion loan for Indonesia.
"We are sure that this loan will be used to buy arms," Dimidyuk said.
He added that Indonesia had asked Russia to modernize its Soviet-era weapons and equipment.
"All of their Soviet-made weapons are obsolete," he said.