The Prime Minister last week repaid about $1,700 he had claimed to travel to the weddings of former colleagues Sophie Mirabella and Peter Slipper in 2006.
But long-serving federal Liberal MP Philip Ruddock was also at Mr Slipper's wedding and says he has decided not to repay the travel entitlements he claimed.
Mr Ruddock says he was only at the wedding because he was the attorney-general at the time, and Mr Slipper was the then chairman of a legal committee.
"I have thought about it overnight and quite frankly my judgment at the time was that what I did was appropriate and I still think it was appropriate," he said.
Mr Abbott has said he was prompted to act on his claims after Attorney-General George Brandis last week repaid nearly $1,700 he had claimed from the taxpayer to attend the wedding of radio announcer Michael Smith in 2011.
Agriculture Minister Barnaby Joyce has also repaid $615 for using a taxpayer-funded car to attend the same wedding.
