diff --git a/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp b/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp
index 7d5e685afa..51a0ac21b4 100644
--- a/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp
+++ b/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp
@@ -9,8 +9,8 @@
 
 // constructor
 NavEKF3_core::NavEKF3_core(NavEKF3 *_frontend, AP_DAL &_dal) :
-    frontend(_frontend),
     dal(_dal),
+    frontend(_frontend),
     public_origin(frontend->common_EKF_origin)
 {
     firstInitTime_ms = 0;