Chesterfield set an unwanted club record when they were beaten 2-1 at home by Charlton.
The already-relegated club slumped to a 26th Sky Bet League One defeat of the season through goals from Jake Forster-Caskey and Ricky Holmes.
Reece Mitchell replied in stoppage time for bottom-placed Chesterfield before Forster-Caskey had a penalty saved.
Chesterfield needed a fine save by Thorsten Stuckmann in the 16th minute to keep out a Holmes free-kick from just outside the box.
Joe Rowley almost gave Chesterfield...