diff --git a/EKF/terrain_estimator.cpp b/EKF/terrain_estimator.cpp
index e7951554c0..d308460aa7 100644
--- a/EKF/terrain_estimator.cpp
+++ b/EKF/terrain_estimator.cpp
@@ -41,7 +41,6 @@
 
 #include "ekf.h"
 #include "mathlib.h"
-#include <drivers/drv_hrt.h>
 
 bool Ekf::initHagl()
 {