diff --git a/src/drivers/drv_pwm_output.h b/src/drivers/drv_pwm_output.h
index edb72f04ed..b10c3e18a9 100644
--- a/src/drivers/drv_pwm_output.h
+++ b/src/drivers/drv_pwm_output.h
@@ -231,16 +231,16 @@ ORB_DECLARE(output_pwm);
 #define PWM_SERVO_SET_TERMINATION_FAILSAFE	_IOC(_PWM_SERVO_BASE, 25)
 
 /** force safety switch on (to enable use of safety switch) */
-#define PWM_SERVO_SET_FORCE_SAFETY_ON  _IOC(_PWM_SERVO_BASE, 26)
+#define PWM_SERVO_SET_FORCE_SAFETY_ON		_IOC(_PWM_SERVO_BASE, 26)
 
 /** set RC config for a channel. This takes a pointer to pwm_output_rc_config */
-#define PWM_SERVO_SET_RC_CONFIG  _IOC(_PWM_SERVO_BASE, 27)
+#define PWM_SERVO_SET_RC_CONFIG			_IOC(_PWM_SERVO_BASE, 27)
 
 /** set the 'OVERRIDE OK' bit, which allows for RC control on FMU loss */
-#define PWM_SERVO_SET_OVERRIDE_OK	_IOC(_PWM_SERVO_BASE, 28)
+#define PWM_SERVO_SET_OVERRIDE_OK		_IOC(_PWM_SERVO_BASE, 28)
 
 /** clear the 'OVERRIDE OK' bit, which allows for RC control on FMU loss */
-#define PWM_SERVO_CLEAR_OVERRIDE_OK	_IOC(_PWM_SERVO_BASE, 29)
+#define PWM_SERVO_CLEAR_OVERRIDE_OK		_IOC(_PWM_SERVO_BASE, 29)
 
 /** setup OVERRIDE_IMMEDIATE behaviour on FMU fail */
 #define PWM_SERVO_SET_OVERRIDE_IMMEDIATE	_IOC(_PWM_SERVO_BASE, 30)