Dundee City Council is to bar companies guilty of blacklisting workers from securing contracts.
The decision was taken unanimously after councillors heard a plea from representatives of the Unite union and Labour councillor Richard McCready.
He called for action in the wake of revelations that some construction companies had denied employment to people for their trade union activity or for reporting breaches of health and safety.
Mr McCready told members of the policy and resources committee: “If we take a stand against the unfair practice of blacklisting then a strong message is going out from this council, which will be added to the many similar calls being made up and down the country at this time.”
The committee decided to urge the Scottish Government to ensure any future laws on public sector procurement contain measures to ban blacklisting companies from contracts.
They also decided the city council itself would, where lawful, exclude blacklisters from its own contracts and request that any firm tendering for a contract show that it has policies in place to encourage the reporting of health and safety or welfare concerns by employees.
Mr McCready said: “I was very pleased that there was unanimous support for the proposals which I put forward.
“I was also pleased to see the Dundee Trades Council lobbying councillors as they came into the council in favour of my motion.”