The striker had surgery on his knee on Thursday, although it is not the same one in which he suffered a cruciate ligament injury last season.
Williams is now expected to miss the next eight weeks, taking him to the end of the campaign and the end of his current contract at Victoria Road, meaning he may possibly have played his last game for the Daggers.
Otherwise, interim manager Wayne Burnett has no injury or suspension problems and could well go with the same XI who were held to a 2-2 draw by 10-man Torquay in midweek.
