The Government has been accused of moving people around to bring down the homeless figures.
It comes after reports that it is planning to remove non-EU nationals and people in long-term healthcare facilities from official statistics.
"The Minister's language is very controversial," said Anthony Flynn from Inner City Helping Homeless.
"He has already indicated that he was removing a number of people that were in Section 10 accommodation through Louth County Council.
"This is a further move not to be transparent in regard to homeless services and to keep that number under 10,000 in regard to those that are entering homeless services.
Mr Flynn is worried that the figures may be manipulated.
"Well to declare that non-EU nationals will be no longer entitled to Section 10 accommodation will actually push the rough sleeper number up right across the country.
"His endgame is to basically reduce the numbers that are in homeless services.