diff --git a/libraries/src/Mail/Mail.php b/libraries/src/Mail/Mail.php
index 5696a4e59f0ef..64f9e79be7140 100644
--- a/libraries/src/Mail/Mail.php
+++ b/libraries/src/Mail/Mail.php
@@ -221,7 +221,7 @@ public function setSender($from)
      */
     public function setSubject($subject)
     {
-        $this->Subject = MailHelper::cleanLine($subject);
+        $this->Subject = MailHelper::cleanSubject($subject);
 
         return $this;
     }