diff --git a/ArduPlane/APM_Config.h.reference b/ArduPlane/APM_Config.h.reference
index 1b57196589..8661f304a0 100644
--- a/ArduPlane/APM_Config.h.reference
+++ b/ArduPlane/APM_Config.h.reference
@@ -112,10 +112,8 @@
 // HIL_PROTOCOL_MAVLINK   Configure for HIL over MAVLink.
 //
 // HIL_MODE_DISABLED      Configure for standard flight.
-// HIL_MODE_ATTITUDE      Simulator provides attitude and position information.
 // HIL_MODE_SENSORS       Simulator provides raw sensor values.
 //
-// Note that currently HIL_PROTOCOL_XPLANE requires HIL_MODE_ATTITUDE.
 // Note that currently HIL_PROTOCOL_MAVLINK requires HIL_MODE_SENSORS.
 //
 //#define HIL_MODE				HIL_MODE_DISABLED
diff --git a/ArduPlane/defines.h b/ArduPlane/defines.h
index 33af9d29ba..61238cfabc 100644
--- a/ArduPlane/defines.h
+++ b/ArduPlane/defines.h
@@ -62,8 +62,7 @@ enum gcs_failsafe {
 // are now the same thing, and are sensors based. The old define is
 // kept to allow old APM_Config.h headers to keep working
 #define HIL_MODE_DISABLED                       0
-#define HIL_MODE_ATTITUDE                       1
-#define HIL_MODE_SENSORS                        2
+#define HIL_MODE_SENSORS                        1
 
 enum FlightMode {
     MANUAL        = 0,