United Future leader Peter Dunne says workplace health and safety laws, enacted two decades ago, were clearly wrong.
In 1992, deregulation made employers primarily responsible for health and safety.
The Health and Safety in Employment Act came in for criticism in this week's report from the Royal Commission on the Pike River mine disaster.
It has called for parts of the Act to be urgently overhauled.
Mr Dunne says in retrospect, the changes made in 1992 were wrong and it's appropriate the Government intends to plug the gaps.