diff --git a/ArduPlane/Plane.h b/ArduPlane/Plane.h
index 84c18d207c..5369536a43 100644
--- a/ArduPlane/Plane.h
+++ b/ArduPlane/Plane.h
@@ -83,6 +83,10 @@
 #include <AP_Landing/AP_Landing.h>
 #include <AP_LandingGear/AP_LandingGear.h>     // Landing Gear library
 #include <AP_Follow/AP_Follow.h>
+#include <AP_ExternalControl/AP_ExternalControl_config.h>
+#if AP_EXTERNAL_CONTROL_ENABLED
+#include <AP_ExternalControl/AP_ExternalControl.h>
+#endif
 
 #include "GCS_Mavlink.h"
 #include "GCS_Plane.h"
@@ -770,6 +774,11 @@ private:
 
     AP_Param param_loader {var_info};
 
+    // dummy implementation of external control
+#if AP_EXTERNAL_CONTROL_ENABLED
+    AP_ExternalControl external_control;
+#endif
+
     static const AP_Scheduler::Task scheduler_tasks[];
     static const AP_Param::Info var_info[];