diff --git a/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp b/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp
index 20531c4603..b401a340cc 100644
--- a/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp
+++ b/libraries/AP_NavEKF3/AP_NavEKF3_core.cpp
@@ -158,11 +158,12 @@ bool NavEKF3_core::setup_core(uint8_t _imu_index, uint8_t _core_index)
     if(!storedOutput.init(imu_buffer_length)) {
         return false;
     }
-    gcs().send_text(MAV_SEVERITY_INFO, "EKF3 IMU%u buffers IMU=%u OBS=%u OF=%u, dt=%.4f",
+    gcs().send_text(MAV_SEVERITY_INFO, "EKF3 IMU%u buffs IMU=%u OBS=%u OF=%u EN:%u, dt=%.4f",
                     (unsigned)imu_index,
                     (unsigned)imu_buffer_length,
                     (unsigned)obs_buffer_length,
                     (unsigned)flow_buffer_length,
+                    (unsigned)extnav_buffer_length,
                     (double)dtEkfAvg);
 
     if ((yawEstimator == nullptr) && (frontend->_gsfRunMask & (1U<<core_index))) {