diff --git a/ArduCopter/radio.cpp b/ArduCopter/radio.cpp
index 49eeee371c..212763d03a 100644
--- a/ArduCopter/radio.cpp
+++ b/ArduCopter/radio.cpp
@@ -20,10 +20,10 @@ void Copter::default_dead_zones()
 
 void Copter::init_rc_in()
 {
-    channel_roll     = rc().channel(rcmap.roll()-1);
-    channel_pitch    = rc().channel(rcmap.pitch()-1);
-    channel_throttle = rc().channel(rcmap.throttle()-1);
-    channel_yaw      = rc().channel(rcmap.yaw()-1);
+    channel_roll     = rc().get_roll_channel();
+    channel_pitch    = rc().get_pitch_channel();
+    channel_throttle = rc().get_throttle_channel();
+    channel_yaw      = rc().get_yaw_channel();
 
     // set rc channel ranges
     channel_roll->set_angle(ROLL_PITCH_YAW_INPUT_MAX);