diff --git a/Classes/Service/MailTemplateService.php b/Classes/Service/MailTemplateService.php
index 8fa8c941063881811e5fb0b553a7f1af37fe13f6..3b4cc4d7112a6d56afb014af5e464d5455a5efb6 100644
--- a/Classes/Service/MailTemplateService.php
+++ b/Classes/Service/MailTemplateService.php
@@ -195,6 +195,7 @@ class MailTemplateService {
 	 * description and subject can now be an array i.e. with elements such as 'en' => 'english description'
 	 * or an translation string used in locallang.xml
 	 *
+	 * @deprecated public usage of this function is deprecated. use registerByFile instead
 	 * @param string $extension
 	 * @param string $templateName
 	 * @param string $templatePath