Ride-hailing giant Go-Jek has secured an investment from Siam Commercial Bank Pcl, the Thai lender that counts King Maha Vajiralongkorn as its biggest shareholder, according to people familiar with the matter.

It’s unclear how much Thailand’s biggest bank is investing in Go-Jek, the people said, who asked not to be identified because the matter is private. Their partnership will help Indonesia’s most valuable technology startup bolster its financial services, while Siam Commercial is counting on online growth to help increase revenue, they added.