Malcolm Turnbull has met with executives from the Indian company wanting to build Australia's biggest coal mine with the help of federal funding during his stay in New Delhi.
Senior executives of Adani, including founder and chairman Gautam Adani, discussed India's growing need for energy during the private meeting with the prime minister on Monday evening.
The company's $21.7 billion Carmichael coal mine project in Queensland was approved in December but has faced serious opposition from environmental and Indigenous groups.
Mr Adani requested an early resolution of native title issues surrounding the mine, which was hit by a Federal Court ruling that invalidated deals with traditional owners across Australia.
Legislation dealing with the problem is before the Senate and Mr Turnbull is understood to have assured the company the issue would be fixed.
On Tuesday, Mr Turnbull said he expected the changes to overrule the court's decision would pass parliament when it returns in May, saying the ruling had caused problems with many agreements across the country.
"It's a decision that can't be allowed in practical terms to let stand," he told reporters in New Delhi.
Labor has written to the prime minister expressing concerns the legislation before parliament goes beyond merely rectifying the court decision.
Opposition Leader Bill Shorten blamed Attorney-General George Brandis, saying anything he touched turned to "custard".
Mr Turnbull said the changes parliament would deal with in May would only go to the Federal Court decision.
"Any further amendments interested parties want to advance will be considered at a future date," he said.
The federal government is also considering a bid for a $1 billion concessional loan from its Northern Australia infrastructure fund to help build a rail line servicing the mine.
Ahead of the meeting, Mr Turnbull insisted a decision on the potential loan was going through an independent process.
Mr Turnbull said Mr Adani had raised the issue of the loan for the rail line, but only to indicate his company intended to apply for money from the Northern Australia Infrastructure Fund.
Federal Labor has questioned the merit of granting the taxpayer-funded loan for a railway line.
"If you want to have a good commercial operation in Australia, I am not convinced the taxpayer of Australia should underwrite the risk of the project through a billion dollar loan," Opposition Leader Bill Shorten told reporters in Brisbane.
Mr Shorten said other mining companies are not getting billion dollar railways built for them.
"We have to make sure it stacks up," Mr Shorten said.
The Greens are planning an attempt to block any government funding for the mine or its railway line via legislation introducing a suitable person test for infrastructure fund applicants.
Environment spokeswoman Larissa Waters didn't believe Adani would pass the test.
"Overseas, Adani is under investigation for money laundering, fraud and corruption, including allegedly bribing public officials," she told AAP.
"They have ignored environmental laws causing irreversible damage."
Mr Adani requested an early resolution of native title issues surrounding the mine, which was hit by a Federal Court ruling that invalidated deals with traditional owners across Australia.
Legislation dealing with the problem is before the Senate and Mr Turnbull is understood to have assured the company the issue needed to be fixed and would be fixed.
Earlier on Monday, in a joint press appearance with Indian prime minister Narendra Modi, Mr Turnbull talked up the importance of Australian resources and expertise to the Indian energy sector.
"We're pleased to be providing increasing quantities of high quality coal for steel-making and increasingly for power generation with advanced supercritical technology," he told reporters.
