The Bears announced roster moves at safety Wednesday.
S Anthony Walters, who had played in each of the past four games, was placed on injured reserve with a hamstring injury. The Bears signed S Winston Venable, who has shuffled between Chicago's active roster and practice squad this season.
Venable played in five games for the Bears earlier this season and recorded five special-teams tackles.
The Bears still have one open roster spot and are expected to fill it with an offensive lineman.