diff --git a/Blimp/system.cpp b/Blimp/system.cpp
index 17053e2f3e..24c3390621 100644
--- a/Blimp/system.cpp
+++ b/Blimp/system.cpp
@@ -49,6 +49,7 @@ void Blimp::init_ardupilot()
 
     // initialise rc channels including setting mode
     rc().init();
+    rc().convert_options(RC_Channel::AUX_FUNC::ARMDISARM_UNUSED, RC_Channel::AUX_FUNC::ARMDISARM);
 
     // sets up motors and output to escs
     init_rc_out();