diff --git a/mission/controller/ThermalController.cpp b/mission/controller/ThermalController.cpp
index 40732968..5e34d191 100644
--- a/mission/controller/ThermalController.cpp
+++ b/mission/controller/ThermalController.cpp
@@ -172,7 +172,7 @@ void ThermalController::performControlOperation() {
         transitionToOffCycles++;
         // if heater still ON after 10 cycles, switch OFF again
         if (transitionToOffCycles == 10) {
-          for (uint8_t i; i < heater::Switchers::NUMBER_OF_SWITCHES; i++) {
+          for (uint8_t i = 0; i < heater::Switchers::NUMBER_OF_SWITCHES; i++) {
             heaterHandler.switchHeater(static_cast<heater::Switchers>(i),
                                        HeaterHandler::SwitchState::OFF);
           }
@@ -1745,7 +1745,7 @@ void ThermalController::tooHotHandlerWhichClearsOneShotFlag(object_id_t object,
 void ThermalController::startTransition(Mode_t mode_, Submode_t submode_) {
   triggerEvent(CHANGING_MODE, mode_, submode_);
   if (mode_ == MODE_OFF) {
-    for (uint8_t i; i < heater::Switchers::NUMBER_OF_SWITCHES; i++) {
+    for (uint8_t i = 0; i < heater::Switchers::NUMBER_OF_SWITCHES; i++) {
       heaterHandler.switchHeater(static_cast<heater::Switchers>(i),
                                  HeaterHandler::SwitchState::OFF);
     }