diff --git a/ROMFS/px4fmu_common/init.d/4011_dji_f450 b/ROMFS/px4fmu_common/init.d/4011_dji_f450
index 2a77f13866..3682381a19 100644
--- a/ROMFS/px4fmu_common/init.d/4011_dji_f450
+++ b/ROMFS/px4fmu_common/init.d/4011_dji_f450
@@ -22,7 +22,11 @@ then
 	param set MC_YAWRATE_P 0.3
 	param set MC_YAWRATE_I 0.1
 	param set MC_YAWRATE_D 0.0
+	param set PWM_DISARMED 900
+	param set PWM_MIN 1230
+	param set PWM_MAX 1950
 fi
 
-set PWM_MIN 1230
-set PWM_MAX 1950
+set PWM_DISARMED p:PWM_DISARMED
+set PWM_MIN p:PWM_MIN
+set PWM_MAX p:PWM_MAX