Fianna Fáil TD Billy Kelleher has said he will be voting against the Constitutional amendment strengthening the powers of Dáil committees.
Submit your referendum question here
The Fianna Fáil frontbencher says the measure needed more debate and conferred sweeping powers on members of the Oireachtas that would have a quasi-judicial effect.
He also said it would give enormous powers to investigators who would be able to secure warrants to enter people's homes.
The Cork North Central Deputy accepted that he had supported the measure in the Dáil, but said there had been a very short timeframe for debate.
He said the measure clearly contained powers which should make TDs tread warily.
The two referendums, on Oireachtas inquiries and judges' pay, will be held on the same day as the Presidential election - 27 October