French President Nicolas Sarkozy has moved to speed up a vote on his retirement reforms as unions called for further strikes.
The government invoked a constitutional clause that allows for an emergency vote on the text.
But the move did not deter protestors, who marched through Paris against the planned raising of the retirement age to 62.
Labour unions said they would strike again on October 28 and November 6.
They also refused to rule out further action even if the law is passed by the Senate.
Deputies in France’s upper chamber are expected to vote this weekend.
Sarkozy argues the changes are needed to plug a 32-billion-euro shortfall in the country’s state pension scheme.
That gap is forecast to swell to 80 billion without reform.