India has approved a $5.43 billion deal to purchase S-400 Triumf anti-aircraft missile systems from Russia, despite US threats of sanctions against New Delhi, local media reported, citing government sources.

The Cabinet Committee on Security, chaired by PM Narendra Modi, has cleared the “game-changing acquisition” on Wednesday, according to the Times of India. The move comes ahead of Russian President Vladimir Putin’s visit early next month.

The Indian Air Force (IAF), which operates the country’s air defenses, is expected to receive first S-400 squadron within 24 months after the contract’s signing. The rest will be delivered within the next 4-5 years.

India will have to pay 15 percent of total costs on inking the contract, while the rest will be linked to deliveries of the systems, according to the report. The Indian government, however, has not confirmed its readiness to ink the deal so far.