diff --git a/EKF/estimator_interface.h b/EKF/estimator_interface.h
index 82df669166..e7e26c103c 100644
--- a/EKF/estimator_interface.h
+++ b/EKF/estimator_interface.h
@@ -286,6 +286,8 @@ public:
 		}
 	}
 
+	const matrix::Quatf &get_quaternion() const { return _output_new.quat_nominal; }
+
 	// return the quaternion defining the rotation from the EKF to the External Vision reference frame
 	virtual void get_ekf2ev_quaternion(float *quat) = 0;