diff --git a/ArduPlane/RC_Channel.cpp b/ArduPlane/RC_Channel.cpp
index cb426ab21f..d61413c3d0 100644
--- a/ArduPlane/RC_Channel.cpp
+++ b/ArduPlane/RC_Channel.cpp
@@ -141,7 +141,7 @@ void RC_Channel_Plane::do_aux_function_flare(AuxSwitchPos ch_flag)
 }
 
 
-void RC_Channel_Plane::init_aux_function(const RC_Channel::aux_func_t ch_option,
+void RC_Channel_Plane::init_aux_function(const RC_Channel::AUX_FUNC ch_option,
                                          const RC_Channel::AuxSwitchPos ch_flag)
 {
     switch(ch_option) {
@@ -212,7 +212,7 @@ void RC_Channel_Plane::init_aux_function(const RC_Channel::aux_func_t ch_option,
 }
 
 // do_aux_function - implement the function invoked by auxiliary switches
-bool RC_Channel_Plane::do_aux_function(const aux_func_t ch_option, const AuxSwitchPos ch_flag)
+bool RC_Channel_Plane::do_aux_function(const AUX_FUNC ch_option, const AuxSwitchPos ch_flag)
 {
     switch(ch_option) {
     case AUX_FUNC::INVERTED:
diff --git a/ArduPlane/RC_Channel.h b/ArduPlane/RC_Channel.h
index 7ecc352c32..858034478c 100644
--- a/ArduPlane/RC_Channel.h
+++ b/ArduPlane/RC_Channel.h
@@ -9,9 +9,9 @@ public:
 
 protected:
 
-    void init_aux_function(aux_func_t ch_option,
+    void init_aux_function(AUX_FUNC ch_option,
                            AuxSwitchPos ch_flag) override;
-    bool do_aux_function(aux_func_t ch_option, AuxSwitchPos) override;
+    bool do_aux_function(AUX_FUNC ch_option, AuxSwitchPos) override;
 
     // called when the mode switch changes position:
     void mode_switch_changed(modeswitch_pos_t new_pos) override;