diff --git a/ROMFS/px4fmu_common/init.d/rc.custom_dji_f330_mkblctrl b/ROMFS/px4fmu_common/init.d/rc.custom_dji_f330_mkblctrl
index 4686382ca6..2fd0200a2b 100644
--- a/ROMFS/px4fmu_common/init.d/rc.custom_dji_f330_mkblctrl
+++ b/ROMFS/px4fmu_common/init.d/rc.custom_dji_f330_mkblctrl
@@ -105,9 +105,12 @@ fi
 #
 # Set disarmed, min and max PWM signals
 #
-pwm disarmed -c 1234 -p 900
-pwm min -c 1234 -p 1200
-pwm max -c 1234 -p 1800
+if [ -f /dev/pwm_output ]
+then
+	#pwm disarmed -c 1234 -p 900
+	pwm min -c 1234 -p 1200
+	pwm max -c 1234 -p 1800
+fi
 
 #
 # Start common for all multirotors apps