diff --git a/auth.php b/auth.php
index ce0391e..6069474 100644
--- a/auth.php
+++ b/auth.php
@@ -239,10 +239,9 @@ class auth_plugin_emailotp extends auth_plugin_base {
             return true;
         }
         // Log reader required - silently return failure on absence.
-        if (!$reader = reset(get_log_manager()->get_readers('\core\log\sql_reader'))) {
-            return false;
-        }
-        return $reader->get_events_select_count(
+        $readers = get_log_manager()->get_readers('\core\log\sql_reader');
+        $reader = reset($readers);
+        return $reader && $reader->get_events_select_count(
             'component = ? AND action = ? AND timecreated >= ? AND other = ?',
             array(
                 self::COMPONENT_NAME,
diff --git a/settings.php b/settings.php
index ae1451e..e19791b 100644
--- a/settings.php
+++ b/settings.php
@@ -65,7 +65,8 @@ if ($ADMIN->fulltree) {
         get_string('minrequestperiod_help', 'auth_emailotp')
     ) extends admin_setting_configtext {
         public function __construct($name, $visiblename, $description) {
-            $logreader = reset(get_log_manager()->get_readers('\core\log\sql_reader'));
+            $readers = get_log_manager()->get_readers('\core\log\sql_reader');
+            $logreader = reset($readers);
             parent::__construct($name, $visiblename, $description, $logreader ? 120 : 0, PARAM_INT);
             if (!$logreader && !empty($this->get_setting())) {
                 $this->description .= ' '.get_string('logstorerequired', 'auth_emailotp',