diff --git a/libraries/AP_NavEKF2/AP_NavEKF2_core.cpp b/libraries/AP_NavEKF2/AP_NavEKF2_core.cpp
index b45aaa70cf..4644c82225 100644
--- a/libraries/AP_NavEKF2/AP_NavEKF2_core.cpp
+++ b/libraries/AP_NavEKF2/AP_NavEKF2_core.cpp
@@ -13,10 +13,6 @@ extern const AP_HAL::HAL& hal;
 
 #define earthRate 0.000072921f // earth rotation rate (rad/sec)
 
-// when the wind estimation first starts with no airspeed sensor,
-// assume 3m/s to start
-#define STARTUP_WIND_SPEED 3.0f
-
 // initial imu bias uncertainty (deg/sec)
 #define INIT_ACCEL_BIAS_UNCERTAINTY 0.5f