diff --git a/libraries/AP_SerialManager/AP_SerialManager.cpp b/libraries/AP_SerialManager/AP_SerialManager.cpp
index 4b6d12f92b..ad8a3b8c40 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.cpp
+++ b/libraries/AP_SerialManager/AP_SerialManager.cpp
@@ -136,7 +136,7 @@ const AP_Param::GroupInfo AP_SerialManager::var_info[] = {
     // @Param: 1_PROTOCOL
     // @DisplayName: Telem1 protocol selection
     // @Description: Control what protocol to use on the Telem1 port. Note that the Frsky options require external converter hardware. See the wiki for details.
-    // @Values: -1:None, 1:MAVLink1, 2:MAVLink2, 3:Frsky D, 4:Frsky SPort, 5:GPS, 7:Alexmos Gimbal Serial, 8:SToRM32 Gimbal Serial, 9:Rangefinder, 10:FrSky SPort Passthrough (OpenTX), 11:Lidar360, 13:Beacon, 14:Volz servo out, 15:SBus servo out, 16:ESC Telemetry, 17:Devo Telemetry, 18:OpticalFlow, 19:RobotisServo, 20:NMEA Output, 21:WindVane, 22:SLCAN, 23:RCIN, 24:MegaSquirt EFI, 25:LTM, 26:RunCam, 27:HottTelem, 28:Scripting, 29:Crossfire VTX, 30:Generator, 31:Winch, 32:MSP, 33:DJI FPV, 34:AirSpeed, 35:ADSB, 36:AHRS, 37:SmartAudio, 38:FETtecOneWire, 39:Torqeedo, 40:AIS, 41:CoDevESC, 42:DisplayPort, 43:MAVLink High Latency
+    // @Values: -1:None, 1:MAVLink1, 2:MAVLink2, 3:Frsky D, 4:Frsky SPort, 5:GPS, 7:Alexmos Gimbal Serial, 8:SToRM32 Gimbal Serial, 9:Rangefinder, 10:FrSky SPort Passthrough (OpenTX), 11:Lidar360, 13:Beacon, 14:Volz servo out, 15:SBus servo out, 16:ESC Telemetry, 17:Devo Telemetry, 18:OpticalFlow, 19:RobotisServo, 20:NMEA Output, 21:WindVane, 22:SLCAN, 23:RCIN, 24:MegaSquirt EFI, 25:LTM, 26:RunCam, 27:HottTelem, 28:Scripting, 29:Crossfire VTX, 30:Generator, 31:Winch, 32:MSP, 33:DJI FPV, 34:AirSpeed, 35:ADSB, 36:AHRS, 37:SmartAudio, 38:FETtecOneWire, 39:Torqeedo, 40:AIS, 41:CoDevESC, 42:DisplayPort, 43:MAVLink High Latency, 44:IRC Tramp
     // @User: Standard
     // @RebootRequired: True
     AP_GROUPINFO("1_PROTOCOL",  1, AP_SerialManager, state[1].protocol, SerialProtocol_MAVLink2),
diff --git a/libraries/AP_SerialManager/AP_SerialManager.h b/libraries/AP_SerialManager/AP_SerialManager.h
index eac746d0a1..aa18415e2b 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.h
+++ b/libraries/AP_SerialManager/AP_SerialManager.h
@@ -170,6 +170,7 @@ public:
         SerialProtocol_CoDevESC = 41,
         SerialProtocol_MSP_DisplayPort = 42,
         SerialProtocol_MAVLinkHL = 43,
+        SerialProtocol_Tramp = 44,
         SerialProtocol_NumProtocols                    // must be the last value
     };