diff --git a/EKF/estimator_interface.cpp b/EKF/estimator_interface.cpp
index 3fa6858e8f..7ebd465abe 100644
--- a/EKF/estimator_interface.cpp
+++ b/EKF/estimator_interface.cpp
@@ -371,8 +371,8 @@ bool EstimatorInterface::initialise_interface(uint64_t timestamp)
 	_time_last_range = 0;
 	_time_last_airspeed = 0;
 	_time_last_optflow = 0;
-
 	memset(&_fault_status.flags, 0, sizeof(_fault_status.flags));
+	_time_last_ext_vision = 0;
 	return true;
 }