diff --git a/libraries/RC_Channel/RC_Channel.h b/libraries/RC_Channel/RC_Channel.h
index b97f43b538ca68..01ff72d399dcbe 100644
--- a/libraries/RC_Channel/RC_Channel.h
+++ b/libraries/RC_Channel/RC_Channel.h
@@ -261,7 +261,7 @@ class RC_Channel {
         ICE_START_STOP =     179, // AP_ICEngine start stop
         AUTOTUNE_TEST_GAINS = 180, // auto tune tuning switch to test or revert gains
         QUICKTUNE =          181,  //quicktune 3 position switch
-        AHRS_AUTO_TRIM =     182,  // in-flight trim Copter AHRS using manual levelling
+        AHRS_AUTO_TRIM =     182,  // in-flight AHRS autotrim
         AUTOLAND =           183,  //Fixed Wing AUTOLAND Mode
 
         // inputs from 200 will eventually used to replace RCMAP