diff --git a/APMrover2/Rover.cpp b/APMrover2/Rover.cpp
index 77487f2d51..9f5399b8ab 100644
--- a/APMrover2/Rover.cpp
+++ b/APMrover2/Rover.cpp
@@ -26,7 +26,6 @@ Rover::Rover(void) :
     param_loader(var_info),
     channel_steer(nullptr),
     channel_throttle(nullptr),
-    channel_aux(nullptr),
     channel_lateral(nullptr),
     logger{g.log_bitmask},
     modes(&g.mode1),
diff --git a/APMrover2/Rover.h b/APMrover2/Rover.h
index 194d9648b1..7fa8470061 100644
--- a/APMrover2/Rover.h
+++ b/APMrover2/Rover.h
@@ -165,7 +165,6 @@ private:
     // primary control channels
     RC_Channel *channel_steer;
     RC_Channel *channel_throttle;
-    RC_Channel *channel_aux;
     RC_Channel *channel_lateral;
 
     AP_Logger logger;