diff --git a/EKF/ekf.h b/EKF/ekf.h
index dd4f9edd2b..e48a72d0f7 100644
--- a/EKF/ekf.h
+++ b/EKF/ekf.h
@@ -44,7 +44,7 @@
 
 #include "estimator_interface.h"
 
-class Ekf : public EstimatorInterface
+class Ekf final : public EstimatorInterface
 {
 public:
 	static constexpr uint8_t _k_num_states{24};		///< number of EKF states