diff --git a/Marlin/src/feature/controllerfan.cpp b/Marlin/src/feature/controllerfan.cpp
index 5efddbb111..03ef31e414 100644
--- a/Marlin/src/feature/controllerfan.cpp
+++ b/Marlin/src/feature/controllerfan.cpp
@@ -58,7 +58,7 @@ void ControllerFan::update() {
     //   - At least one stepper driver is enabled
     //   - The heated bed is enabled
     //   - TEMP_SENSOR_BOARD is reporting >= CONTROLLER_FAN_MIN_BOARD_TEMP
-    const ena_mask_t axis_mask = TERN(CONTROLLER_FAN_USE_Z_ONLY, _BV(Z_AXIS), ~TERN0(CONTROLLER_FAN_IGNORE_Z, _BV(Z_AXIS)));
+    const ena_mask_t axis_mask = TERN(CONTROLLER_FAN_USE_Z_ONLY, _BV(Z_AXIS), (ena_mask_t)~TERN0(CONTROLLER_FAN_IGNORE_Z, _BV(Z_AXIS)));
     if ( (stepper.axis_enabled.bits & axis_mask)
       || TERN0(HAS_HEATED_BED, thermalManager.temp_bed.soft_pwm_amount > 0)
       || TERN0(HAS_CONTROLLER_FAN_MIN_BOARD_TEMP, thermalManager.wholeDegBoard() >= CONTROLLER_FAN_MIN_BOARD_TEMP)