diff --git a/src/modules/attitude_estimator_ekf/attitude_estimator_ekf_params.c b/src/modules/attitude_estimator_ekf/attitude_estimator_ekf_params.c
index 528ef45fa8..3ff3d99229 100755
--- a/src/modules/attitude_estimator_ekf/attitude_estimator_ekf_params.c
+++ b/src/modules/attitude_estimator_ekf/attitude_estimator_ekf_params.c
@@ -40,6 +40,7 @@
  */
 
 #include "attitude_estimator_ekf_params.h"
+#include <math.h>
 
 /* Extended Kalman Filter covariances */