Attorney-General Christian Porter appears close to winning crossbench support for the government's industrial relations bill and determined to secure its passage when Parliament resumes next week.

Mr Porter has agreed to additional amendments proposed by One Nation Leader Pauline Hanson and the government has listed the union-busting Ensuring Integrity bill on the Senate's draft program for Monday.

Attorney-General Christian Porter is open to further changes to his union-busting bill. Credit:AAP

The government needs the support of either One Nation or Tasmanian senator Jacqui Lambie to get the bill through the upper house, after negotiating initial amendments with Centre Alliance senator Rex Patrick.

The One Nation amendments aim to to ensure only officials convicted of criminal offences - or fined over significant workplace law breaches - can be disqualified under the legislation, which will make it easier to deregister law breaking unions and ban officials.