diff --git a/libraries/AP_Soaring/AP_Soaring.cpp b/libraries/AP_Soaring/AP_Soaring.cpp
index 6133e1e920..9fd24b3509 100644
--- a/libraries/AP_Soaring/AP_Soaring.cpp
+++ b/libraries/AP_Soaring/AP_Soaring.cpp
@@ -2,6 +2,7 @@
 
 #if HAL_SOARING_ENABLED
 
+#include <AP_AHRS/AP_AHRS.h>
 #include <AP_Logger/AP_Logger.h>
 #include <AP_TECS/AP_TECS.h>
 #include <GCS_MAVLink/GCS.h>
diff --git a/libraries/AP_Soaring/Variometer.cpp b/libraries/AP_Soaring/Variometer.cpp
index 712a6c3b4d..67e33fba03 100644
--- a/libraries/AP_Soaring/Variometer.cpp
+++ b/libraries/AP_Soaring/Variometer.cpp
@@ -4,6 +4,7 @@ Manages the estimation of aircraft total energy, drag and vertical air velocity.
 */
 #include "Variometer.h"
 
+#include <AP_AHRS/AP_AHRS.h>
 #include <AP_Logger/AP_Logger.h>
 
 Variometer::Variometer(const AP_FixedWing &parms, const PolarParams &polarParams) :
diff --git a/libraries/AP_Soaring/Variometer.h b/libraries/AP_Soaring/Variometer.h
index d5237b92dc..4dea29fd05 100644
--- a/libraries/AP_Soaring/Variometer.h
+++ b/libraries/AP_Soaring/Variometer.h
@@ -5,10 +5,11 @@ Manages the estimation of aircraft total energy, drag and vertical air velocity.
 */
 #pragma once
 
-#include <AP_AHRS/AP_AHRS.h>
 #include <AP_Param/AP_Param.h>
 #include <Filter/AverageFilter.h>
+#include <Filter/LowPassFilter.h>
 #include <AP_Vehicle/AP_FixedWing.h>
+#include <AP_Common/Location.h>
 
 class Variometer {