The roundabout north of Cameron Street will be a construction zone for up to two weeks.
According to Mick Jones, city streets operations supervisor, crews will spend 10 to 14 days replacing the paving stones, as well as reinstalling and installing a subdrain.
The new paving stones will be the same colour, but a thicker material than the ones they are replacing.
"That and the subdrain should prevent this failure in the future," Jones said.
In the spring, a section of the paving stones in the traffic circle came loose and had to be repaired. Moisture was believed to be the culprit.
The subdrain will collect any surface water in the road's subgrade and take it to the city's storm system, he explained.