diff --git a/ROMFS/px4fmu_common/init.d/2101_fw_AERT b/ROMFS/px4fmu_common/init.d/2101_fw_AERT
index 3631a1e36c..c5bb1477c5 100644
--- a/ROMFS/px4fmu_common/init.d/2101_fw_AERT
+++ b/ROMFS/px4fmu_common/init.d/2101_fw_AERT
@@ -21,6 +21,8 @@ sh /etc/init.d/rc.fw_defaults
 
 set MIXER AERT
 
-# The ESC requires a specific pulse to arm.
+# use PWM parameters for throttle channel
 set PWM_OUT 4
 set PWM_DISARMED p:PWM_DISARMED
+set PWM_MIN p:PWM_MIN
+set PWM_MAX p:PWM_MAX
diff --git a/ROMFS/px4fmu_common/init.d/2104_fw_AETR b/ROMFS/px4fmu_common/init.d/2104_fw_AETR
index 3113ede87a..f533ce66fe 100644
--- a/ROMFS/px4fmu_common/init.d/2104_fw_AETR
+++ b/ROMFS/px4fmu_common/init.d/2104_fw_AETR
@@ -21,6 +21,8 @@ sh /etc/init.d/rc.fw_defaults
 
 set MIXER AETR
 
-# The ESC requires a specific pulse to arm.
+# use PWM parameters for throttle channel
 set PWM_OUT 3
 set PWM_DISARMED p:PWM_DISARMED
+set PWM_MIN p:PWM_MIN
+set PWM_MAX p:PWM_MAX