diff --git a/application/controllers/User.php b/application/controllers/User.php
index 0dcae0708..9574af3a7 100644
--- a/application/controllers/User.php
+++ b/application/controllers/User.php
@@ -200,7 +200,7 @@ class User extends CI_Controller {
 				$data['user_callsign'] = $this->input->post('user_callsign');
 				$data['user_locator'] = $this->input->post('user_locator');
 				$data['user_timezone'] = $this->input->post('user_timezone');
-				$data['user_measurement_base'] = $this->input->post('user_measurement_base') ?? 'Y';
+				$data['user_measurement_base'] = $this->input->post('user_measurement_base') ?? 'K';
 				$data['user_dashboard_map'] = $this->input->post('user_dashboard_map') ?? 'Y';
 				$data['user_stylesheet'] = $this->input->post('user_stylesheet');
 				$data['user_qth_lookup'] = $this->input->post('user_qth_lookup');