The F-35 Joint Program Office will promote multiyear contracts among foreign aircraft buyers in an effort to reduce costs for the fighter program, the Wall Street Journal reported Thursday.

Doug Cameron writes Lt. Gen. Chris Bogdan, the F-35 JPO’s executive officer, told reporters this week that overseas partners could help increase production of F-35s and lower unit costs by signing multiyear agreements with the U.S. government.

The Defense Department negotiates potential foreign military sales of Lockheed Martin F-35 and Pratt & Whitney fighter engines.

DoD and Lockheed reached a preliminary agreement that aims to cut the price for the next set of F-35s for the U.S. and five partner nations by up to 3.4 percent, according to WSJ.