diff --git a/libraries/RC_Channel/RC_Channel.h b/libraries/RC_Channel/RC_Channel.h
index 74a7bfdabd..468ae342d7 100644
--- a/libraries/RC_Channel/RC_Channel.h
+++ b/libraries/RC_Channel/RC_Channel.h
@@ -209,6 +209,7 @@ public:
         DISABLE_AIRSPEED_USE = 106, // equivalent to AIRSPEED_USE 0
         FW_AUTOTUNE =          107, // fixed wing auto tune
         QRTL =               108, // QRTL mode
+        CUSTOM_CONTROLLER =  109,
         // if you add something here, make sure to update the documentation of the parameter in RC_Channel.cpp!
         // also, if you add an option >255, you will need to fix duplicate_options_exist