diff --git a/libraries/RC_Channel/RC_Channel.cpp b/libraries/RC_Channel/RC_Channel.cpp
index 020bf6d2ac..ed0be828f8 100644
--- a/libraries/RC_Channel/RC_Channel.cpp
+++ b/libraries/RC_Channel/RC_Channel.cpp
@@ -95,7 +95,8 @@ const AP_Param::GroupInfo RC_Channel::var_info[] = {
     // @Description: Function assigned to this RC channel
     // @Values{Copter}: 0:Do Nothing, 2:Flip, 3:Simple Mode, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 10:RangeFinder, 11:Fence, 13:Super Simple Mode, 14:Acro Trainer, 15:Sprayer, 16:Auto, 17:AutoTune, 18:Land, 19:Gripper, 21:Parachute Enable, 22:Parachute Release, 23:Parachute 3pos, 24:Auto Mission Reset, 25:AttCon Feed Forward, 26:AttCon Accel Limits, 27:Retract Mount, 28:Relay On/Off, 29:Landing Gear, 30:Lost Copter Sound, 31:Motor Emergency Stop, 32:Motor Interlock, 33:Brake, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 37:Throw, 38:ADSB Avoidance En, 39:PrecLoiter, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 43:InvertedFlight, 46:RC Override Enable, 47:User Function 1, 48:User Function 2, 49:User Function 3, 52:Acro, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 60:ZigZag, 61:ZigZag SaveWP, 62:Compass Learn, 65:GPS Disable, 66:Relay5, 67:Relay6, 68:Stabilize, 69:PosHold, 70:AltHold, 71:FlowHold, 72:Circle, 73:Drift, 76:Standby Mode, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 83:ZigZag Auto, 84:Air Mode, 85:Generator, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw
     // @Values{Rover}: 0:Do Nothing, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 11:Fence, 16:Auto, 19:Gripper, 24:Auto Mission Reset, 28:Relay On/Off, 30:Lost Rover Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 46:RC Override Enable, 50:LearnCruise, 51:Manual, 52:Acro, 53:Steering, 54:Hold, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 59:Simple Mode, 62:Compass Learn, 63:Sailboat Tack, 65:GPS Disable, 66:Relay5, 67:Relay6, 74:Sailboat motoring 3pos, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 207:MainSail
-    // @Values{Plane}: 0:Do Nothing, 4:ModeRTL, 9:Camera Trigger, 16:ModeAuto, 24:Auto Mission Reset, 28:Relay On/Off, 29:Landing Gear, 34:Relay2 On/Off, 30:Lost Plane Sound, 31:Motor Emergency Stop, 35:Relay3 On/Off, 36:Relay4 On/Off, 38:ADSB Avoidance En, 41:ArmDisarm, 43:InvertedFlight, 46:RC Override Enable, 51:ModeManual, 55:ModeGuided, 56:ModeLoiter, 58:Clear Waypoints, 62:Compass Learn, 64:Reverse Throttle, 65:GPS Disable, 66:Relay5, 67:Relay6, 72:ModeCircle, 77:ModeTakeoff, 78:RunCam Control, 79:RunCam OSD Control, 81:Disarm, 82:QAssist 3pos, 85:Generator, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 208:Flap, 209: Forward Throttle
+    // @Values{Plane}: 0:Do Nothing, 4:ModeRTL, 9:Camera Trigger, 16:ModeAuto, 24:Auto Mission Reset, 28:Relay On/Off, 29:Landing Gear, 34:Relay2 On/Off, 30:Lost Plane Sound, 31:Motor Emergency Stop, 35:Relay3 On/Off, 36:Relay4 On/Off, 38:ADSB Avoidance En, 41:ArmDisarm, 43:InvertedFlight, 46:RC Override Enable, 51:ModeManual, 55:ModeGuided, 56:ModeLoiter, 58:Clear Waypoints, 62:Compass Learn, 64:Reverse Throttle, 65:GPS Disable, 66:Relay5, 67:Relay6, 72:ModeCircle, 77:ModeTakeoff, 78:RunCam Control, 79:RunCam OSD Control, 81:Disarm, 82:QAssist 3pos, 86: Non Auto Terrain Follow Disable, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 208:Flap, 209: Forward Throttle
+
     // @User: Standard
     AP_GROUPINFO_FRAME("OPTION",  6, RC_Channel, option, 0, AP_PARAM_FRAME_COPTER|AP_PARAM_FRAME_ROVER|AP_PARAM_FRAME_PLANE),
 
diff --git a/libraries/RC_Channel/RC_Channel.h b/libraries/RC_Channel/RC_Channel.h
index 5ee4d78551..789ec10c80 100644
--- a/libraries/RC_Channel/RC_Channel.h
+++ b/libraries/RC_Channel/RC_Channel.h
@@ -182,9 +182,10 @@ public:
         Q_ASSIST =            82, // disable, enable and force Q assist
         ZIGZAG_Auto =         83, // zigzag auto switch
         AIRMODE =             84, // enable / disable airmode for copter
+        GENERATOR   =         85, // generator control
+        TER_DISABLE =         86, // disable terrain following in CRUISE/FBWB modes
         // entries from 100 onwards are expected to be developer
         // options used for testing
-        GENERATOR   =         85, // generator control
         KILL_IMU1 =          100, // disable first IMU (for IMU failure testing)
         KILL_IMU2 =          101, // disable second IMU (for IMU failure testing)
         CAM_MODE_TOGGLE =    102, // Momentary switch to cycle camera modes