From this day forward anyone killed in the military service of Australia - whether in war, peacekeeping or some other operation - will be listed on the Australian War Memorial's roll of honour.

It wasn't always this way.

Under longstanding policy, only those who died in conflict were listed, and that excluded 48 men and women killed in post-World War II peacekeeping and other operations.

That was reversed earlier this year following a public campaign by Avril Clark of Perth, whose son Private Jamie Clark died in an accidental fall in the Solomon Islands in 2005.

"I automatically assumed his name would be here and found out it wasn't," she told reporters on Friday.

"It means the world to my family to know he's alongside his fallen comrades ... where he rightly deserves (to be)."

Sarah McCarthy of Canberra said her father Captain Peter McCarthy died in Lebanon in 1988 in a landmine explosion.

"Finally I feel I have a personal connection with the memorial," she said.

"To see his name there, alongside all his other peers and comrades, it gives him the honour I have known he always deserved.

"To me and my family, this means the world."

The names of Private Clark and Captain McCarthy are now listed with 46 others on new bronze panels unveiled in the War Memorial's cloister, alongside the names of more than 100,000 others killed in more than a century of conflict.

They include four sailors killed clearing sea mines in 1947, nine defence personnel killed in the Sea King helicopter crash in Indonesia in 2005 and most recently, Craftsman Beau Pridue, killed in a motor vehicle crash in East Timor in 2011.

War Memorial director Brendan Nelson said this was a day of immense importance for the families.

"I feel a deep sense of personal pride and satisfaction in having played a role in addressing something that wasn't right," he said.

Dr Nelson said some of those now on the roll of honour were soldiers he was personally responsible for ordering deployed during his time as coalition government defence minister.

"I now feel these men and women have now been recognised as they should."