But Eastman could feature in derby
A nasty collision against Spurs last weekend knocked out the U's centre half and he will have to miss the Essex derby as he recovers.
Fellow defender Tom Eastman, with whom Wynter collided, is in the squad for the game at Roots Hall.
Eastman returned to the field after having stitches in a head wound but was replaced later in the first half of the FA Cup tie against the Londoners.
He suffered no real ill effects from the knock and returned to training on Thursday.
At the other end of the pitch, Marvin Sordell is expected to miss out with an ankle injury, while Tom Lapslie and Sammie Szmodics are still sidelined.