diff --git a/libraries/AP_OpticalFlow/OpticalFlow.cpp b/libraries/AP_OpticalFlow/OpticalFlow.cpp
index d3189bae75..3e66c834b1 100644
--- a/libraries/AP_OpticalFlow/OpticalFlow.cpp
+++ b/libraries/AP_OpticalFlow/OpticalFlow.cpp
@@ -70,8 +70,8 @@ const AP_Param::GroupInfo OpticalFlow::var_info[] = {
 
 // default constructor
 OpticalFlow::OpticalFlow(AP_AHRS_NavEKF &ahrs)
-    : _last_update_ms(0)
-    , _ahrs(ahrs)
+    : _ahrs(ahrs),
+      _last_update_ms(0)
 {
     AP_Param::setup_object_defaults(this, var_info);