diff --git a/ArduCopter/radio.cpp b/ArduCopter/radio.cpp
index 9bd168d660..1d7fba2320 100644
--- a/ArduCopter/radio.cpp
+++ b/ArduCopter/radio.cpp
@@ -182,5 +182,5 @@ void Copter::set_throttle_zero_flag(int16_t throttle_control)
 // pass pilot's inputs to motors library (used to allow wiggling servos while disarmed on heli, single, coax copters)
 void Copter::radio_passthrough_to_motors()
 {
-    motors->set_radio_passthrough(channel_roll->get_control_in()/1000.0f, channel_pitch->get_control_in()/1000.0f, channel_throttle->get_control_in()/1000.0f, channel_yaw->get_control_in()/1000.0f);
+    motors->set_radio_passthrough(channel_roll->norm_input(), channel_pitch->norm_input(), channel_throttle->norm_input(), channel_yaw->norm_input());
 }