Ahead of next week's crucial meeting of the Nuclear Suppliers Group (NSG), a top Swiss lawmaker has said his government will "most likely" support a waiver for India at the 45-nation grouping.

"The Indo-US nuclear deal is important for India's energy security and I think Swiss Government will most likely support the waiver for New Delhi at the NSG meet," Speaker of the Upper House of Swiss Parliament Christoffel Brandil said.

Brandil, who was here leading a parliamentary delegation, said Switzerland understands India's energy requirement for overall economic development.

"The nuclear deal is good for India and it should be allowed to go through," Brandil said.

Switzerland's stand will be crucial at the August 21-22 meeting of the NSG, which works by consensus and opposition by even one country could hamper India's prospects of nuclear commerce with international community.

Switzerland is yet to declare its official stand on the matter but sources said the country will not pose any hurdle for a waiver to India.

Asked specifically whether Switzerland will support India's case when the NSG meets next week in Vienna, he said his Government would take a favourable stand on the issue.

"It is a decision that has to be taken by the government. The Parliament has no role to play in it. But I am confident that the government will take a favourable stand on the issue," Brandil said.

Switzerland along with New Zealand, Austria and Ireland are seen as difficult nations at the NSG as all four countries insist that such an exemption should not be given to a country which is not a member of the NPT.