diff --git a/ArduSub/ArduSub.cpp b/ArduSub/ArduSub.cpp
index a607e0bbee..bdc0e169e4 100644
--- a/ArduSub/ArduSub.cpp
+++ b/ArduSub/ArduSub.cpp
@@ -268,8 +268,7 @@ void Sub::one_hz_loop()
         // make it possible to change ahrs orientation at runtime during initial config
         ahrs.update_orientation();
 
-        // set all throttle channel settings
-        motors.set_throttle_range(channel_throttle->get_radio_min(), channel_throttle->get_radio_max());
+        motors.update_throttle_range();
     }
 
     // update assigned functions and enable auxiliary servos
diff --git a/ArduSub/radio.cpp b/ArduSub/radio.cpp
index 56e955641d..a1495a799c 100644
--- a/ArduSub/radio.cpp
+++ b/ArduSub/radio.cpp
@@ -52,7 +52,7 @@ void Sub::init_rc_out()
     motors.set_update_rate(g.rc_speed);
     motors.set_loop_rate(scheduler.get_loop_rate_hz());
     motors.init((AP_Motors::motor_frame_class)g.frame_configuration.get(), AP_Motors::motor_frame_type::MOTOR_FRAME_TYPE_PLUS);
-    motors.set_throttle_range(channel_throttle->get_radio_min(), channel_throttle->get_radio_max());
+    motors.update_throttle_range();
 
     // enable output to motors
     if (arming.rc_calibration_checks(true)) {