diff --git a/ArduCopter/Parameters.cpp b/ArduCopter/Parameters.cpp
index 3c9b8c9796..8997f099b4 100644
--- a/ArduCopter/Parameters.cpp
+++ b/ArduCopter/Parameters.cpp
@@ -899,12 +899,14 @@ const AP_Param::GroupInfo ParametersG2::var_info[] = {
     // @User: Advanced
     AP_GROUPINFO("ACRO_Y_EXPO", 9, ParametersG2, acro_y_expo, ACRO_Y_EXPO_DEFAULT),
 
+#if MODE_ACRO_ENABLED == ENABLED
     // @Param: ACRO_THR_MID
     // @DisplayName: Acro Thr Mid
     // @Description: Acro Throttle Mid
     // @Range: 0 1
     // @User: Advanced
     AP_GROUPINFO("ACRO_THR_MID", 10, ParametersG2, acro_thr_mid, ACRO_THR_MID_DEFAULT),
+#endif
 
     // @Param: SYSID_ENFORCE
     // @DisplayName: GCS sysid enforcement
diff --git a/ArduCopter/Parameters.h b/ArduCopter/Parameters.h
index 7f18801a74..2a01afa70f 100644
--- a/ArduCopter/Parameters.h
+++ b/ArduCopter/Parameters.h
@@ -552,7 +552,9 @@ public:
 
     // acro exponent parameters
     AP_Float acro_y_expo;
+#if MODE_ACRO_ENABLED == ENABLED
     AP_Float acro_thr_mid;
+#endif
 
     // frame class
     AP_Int8 frame_class;