Australia says the plan to deliver nuclear submarines remains unchanged, despite opposition to the pact from a top Trump official.

Australia’s Defence Minister Richard Marles said he is “very confident” that the AUKUS security pact between Australia, the United States and the United Kingdom will continue to move forward despite news that the Pentagon is reviewing the 2021 deal between the three nations.

News of the review was first reported on Thursday as US defence officials said re-assessing the pact was necessary to ensure that the military deal, agreed to with much fanfare under former US President Joe Biden, was in line with US President Donald Trump’s “America First” agenda.

The pact includes a deal worth hundreds of billions of dollars to provide Australia with closely-guarded nuclear propulsion technology. Only five other countries besides the US can build nuclear submarines: the UK, China, Russia, France and India.

“The meetings that we’ve had with the United States have been very positive in respect of AUKUS,” Defence Minister Marles told the ABC network.