Deputy Home Minister Nur Jazlan Mohamed has defended Prime Minister Najib Abdul Razak for using a government jet for his family's year-end vacation to several destinations across Australia.

He said many were unaware that Najib, in his capacity as prime minister, is entitled to use the Malaysian government's Airbus Corporate Jet A319.

"It is within his full rights to use the entitlement that he has in his capacity as prime minister," he told Malaysiakini in an interview today.

The Pulai MP noted while it would have been better for Najib to make his own personal arrangements, there were other issues which must considered.