diff --git a/libraries/AP_NavEKF/AP_NavEKF.cpp b/libraries/AP_NavEKF/AP_NavEKF.cpp
index 5e97b8c5ae..35bfd40d49 100644
--- a/libraries/AP_NavEKF/AP_NavEKF.cpp
+++ b/libraries/AP_NavEKF/AP_NavEKF.cpp
@@ -402,6 +402,8 @@ const AP_Param::GroupInfo NavEKF::var_info[] = {
     // @User: Advanced
     AP_GROUPINFO("GPS_CHECK",    33, NavEKF, _gpsCheck, 31),
 
+    // **NOTE** index 34 is "Enable" and is at the top for AP_PARAM_FLAG_ENABLE
+
     AP_GROUPEND
 };