The Russian parliament has agreed to remove the option of voting against all candidates in future elections.
Polls suggested the "against all" vote was gaining popularity
Supporters of the new legislation say it will encourage greater participation in the political process.
Previously, Russians were able to tick an "against all" box to express their frustration with politicians. On average, just 4% did.
Opponents say the bill has been introduced because the Kremlin fears many would use the protest option.
Recent opinion polls suggest that about 8% of the electorate would choose the "against all" option.
The law is likely to come into effect in time for the next parliamentary and presidential elections, due in 2007 and 2008 respectively, the BBC's James Rodgers reports from Moscow.