diff --git a/lib/editor/atto/adminlib.php b/lib/editor/atto/adminlib.php
index 36dffe0a9e8..511d4667100 100644
--- a/lib/editor/atto/adminlib.php
+++ b/lib/editor/atto/adminlib.php
@@ -104,7 +104,7 @@ class editor_atto_toolbar_setting extends admin_setting_configtextarea {
  * @copyright 2014 Jerome Mouneyrac
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class atto_subplugins_settings extends admin_setting {
+class editor_atto_subplugins_setting extends admin_setting {
 
     /**
      * Constructor.
diff --git a/lib/editor/atto/settings.php b/lib/editor/atto/settings.php
index 3e8523c4018..3ab47531346 100644
--- a/lib/editor/atto/settings.php
+++ b/lib/editor/atto/settings.php
@@ -29,7 +29,7 @@ $ADMIN->add('editorsettings', new admin_category('editoratto', $editor->displayn
 $settings = new admin_settingpage('editorsettingsatto', new lang_string('settings', 'editor_atto'));
 if ($ADMIN->fulltree) {
     require_once(__DIR__ . '/adminlib.php');
-    $settings->add(new atto_subplugins_settings());
+    $settings->add(new editor_atto_subplugins_setting());
     $name = new lang_string('toolbarconfig', 'editor_atto');
     $desc = new lang_string('toolbarconfig_desc', 'editor_atto');
     $default = 'collapse = collapse