A new concept of burn control in a tokamak reactor is discussed where the poloidal divertor is used as a feedback suppressor. The sensor signal of temperature fluctuations from the operating point is amplified, phase shifted and applied to the poloidal divertor plates as a modulating voltage. The resulting electrical current of the correct phase and amplitude can modulate the heat losses in a manner that renders the closed loop system thermally stable. Its completely electrical nature, simplicity and non-interference with the vital systems for heating and fuelling of the tokamak make this scheme technologically attractive.