diff --git a/coordinator/coordinator.lua b/coordinator/coordinator.lua
index 7d5ce0f..a71ca42 100644
--- a/coordinator/coordinator.lua
+++ b/coordinator/coordinator.lua
@@ -630,7 +630,7 @@ function coordinator.comms(version, nic, sv_watchdog)
                                     elseif cmd == UNIT_COMMAND.RESET_RPS then
                                         unit.reset_rps_ack(ack)
                                     elseif cmd == UNIT_COMMAND.SET_BURN then
-                                        unit.set_burn_ack(ack)
+                                        -- this also doesn't exist
                                     elseif cmd == UNIT_COMMAND.SET_WASTE then
                                         -- updated by unit updates
                                     elseif cmd == UNIT_COMMAND.ACK_ALL_ALARMS then
diff --git a/coordinator/iocontrol.lua b/coordinator/iocontrol.lua
index 636a8b7..ff59be1 100644
--- a/coordinator/iocontrol.lua
+++ b/coordinator/iocontrol.lua
@@ -199,7 +199,6 @@ function iocontrol.init(conf, comms, temp_scale, energy_scale)
             scram_ack = __generic_ack,
             reset_rps_ack = __generic_ack,
             ack_alarms_ack = __generic_ack,
-            set_burn_ack = __generic_ack,
 
             alarm_callbacks = {
                 c_breach   = { ack = function () ack(1)  end, reset = function () reset(1)  end },