Secretary for Constitutional Affairs Michael Suen Ming-yeung has asked voters not to demonstrate any disapproval of the electoral system by returning blank ballot papers in the poll.
On an ATV talk show last night, presenter Albert Cheng King-hon told a caller who felt frustrated with the system to leave the paper blank.
'That may be Cheng's opinion, but I think this method is not desirable,' Mr Suen said.
'And I feel such action should not be encouraged.' Mr Suen said dissatisfaction with the system had to be raised through the media.
Earlier yesterday, a group of political activists, campaigning for universal suffrage in the year 2000, called for similar action.
Also on the programme, Mr Suen defended his decision to express his personal views about political development, a move which led the Democratic Party to lodge a formal complaint yesterday.