diff --git a/application/controllers/Qso.php b/application/controllers/Qso.php
index a86fdcf3..87913f1b 100755
--- a/application/controllers/Qso.php
+++ b/application/controllers/Qso.php
@@ -460,7 +460,7 @@ class QSO extends CI_Controller {
       // Allow 2-digit locator
       else if (preg_match('/^[A-Ra-r]{2}$/', $grid)) return true;
       // Allow 8-digit locator
-      else if (preg_match('/^[A-Ra-r]{2}[0-9]{2}[A-Ra-r]{2}[0-9]{2}$/', $grid)) return true;
+      else if (preg_match('/^[A-Ra-r]{2}[0-9]{2}[A-Za-z]{2}[0-9]{2}$/', $grid)) return true;
       else {
          $this->form_validation->set_message('check_locator', 'Please check value for grid locator ('.strtoupper($grid).').');
          return false;