diff --git a/acp/wpn_acp_module.php b/acp/wpn_acp_module.php
index ad44fa5..ebdadc1 100644
--- a/acp/wpn_acp_module.php
+++ b/acp/wpn_acp_module.php
@@ -79,8 +79,7 @@ public function main($id, $mode)
 			{
 				if (!check_form_key($form_key))
 				{
-					$language = $phpbb_container->get('language');
-					trigger_error($language->lang('FORM_INVALID'), E_USER_WARNING);
+					trigger_error($this->lang->lang('FORM_INVALID'), E_USER_WARNING);
 				}
 
 				$this->save_settings();