Ivchenko's comments came one day after a top Gazprom official, Aleksandr Medvedev, said the Russian gas monopoly will stop supplying gas to Ukraine on 1 January if a dispute over prices is not settled until then.
Gazprom wants to hike the price for 1,000 cubic meters from under $50 to $230 in line with international prices.
But Ukrainian leaders say Russia wants to punish them for the country's pro-Western stance.