diff --git a/libraries/AP_NavEKF2/AP_NavEKF2.cpp b/libraries/AP_NavEKF2/AP_NavEKF2.cpp
index 98c8e58a6c..b58f2254db 100644
--- a/libraries/AP_NavEKF2/AP_NavEKF2.cpp
+++ b/libraries/AP_NavEKF2/AP_NavEKF2.cpp
@@ -1,7 +1,7 @@
-#include "AP_NavEKF2.h"
-
 #include "AP_NavEKF2_core.h"
 
+#include "AP_NavEKF2.h"
+
 #include <AP_DAL/AP_DAL.h>
 #include <AP_HAL/AP_HAL.h>
 #include <GCS_MAVLink/GCS.h>