diff --git a/ArduCopter/APM_Config.h b/ArduCopter/APM_Config.h
index 4b5dddc7fb..b7db6c5ca7 100644
--- a/ArduCopter/APM_Config.h
+++ b/ArduCopter/APM_Config.h
@@ -40,6 +40,7 @@
 //#define SPRAYER               ENABLED             // enable the crop sprayer feature (two ESC controlled pumps the speed of which depends upon the vehicle's horizontal velocity)
 //#define PRECISION_LANDING     ENABLED             // enable precision landing using companion computer or IRLock sensor
 //#define GNDEFFECT_COMPENSATION ENABLED            // enable ground effect compensation for barometer (if propwash interferes with the barometer on the ground)
+//#define CAL_ALWAYS_REBOOT                         // flight controller will reboot after compass or accelerometer calibration completes
 
 // other settings
 //#define THROTTLE_IN_DEADBAND   100                // redefine size of throttle deadband in pwm (0 ~ 1000)