diff --git a/registration.install b/registration.install
index 6cfe37e..64973a1 100644
--- a/registration.install
+++ b/registration.install
@@ -626,6 +626,15 @@ function registration_update_7108(&$sandbox) {
     }
     $new_permission = "create {$type_info->name} registration self";
     foreach ($existing as $record) {
+      // Make sure the user has not fixed the permissions themselves.
+      $perm_given = db_select('role_permission', 'r')
+        ->condition('permission', $new_permission)
+        ->fields('r', array('rid'))
+        ->execute();
+      if (!empty($perm_given)) {
+        continue;
+      }
+
       db_insert('role_permission')
         ->fields(array(
           'rid' => $record->rid,