From 107e647d00a75f6650e4729d9f26054c6ab1aca8 Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Tue, 3 Aug 2021 11:59:55 +1000
Subject: [PATCH] AP_AHRS: correct compilation under SITL with no EKF3

---
 libraries/AP_AHRS/AP_AHRS.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libraries/AP_AHRS/AP_AHRS.cpp b/libraries/AP_AHRS/AP_AHRS.cpp
index f6cd0353e8..c2151a21f0 100644
--- a/libraries/AP_AHRS/AP_AHRS.cpp
+++ b/libraries/AP_AHRS/AP_AHRS.cpp
@@ -792,11 +792,15 @@ bool AP_AHRS::airspeed_estimate(float &airspeed_ret) const
 
 #if CONFIG_HAL_BOARD == HAL_BOARD_SITL
     case EKFType::SITL:
+#if HAL_NAVEKF3_AVAILABLE
         if (EKF3.getWind(-1,wind_vel)) {
              ret = true;
         } else {
             ret = false;
         }
+#else
+        ret = false;
+#endif
         break;
 #endif