diff --git a/inc/mail.php b/inc/mail.php
index b4ca105510f046ae7ab6fa50ce7242405c659c5d..6bd3169b4c3056b3662a29f03e19c6e2b933b2be 100644
--- a/inc/mail.php
+++ b/inc/mail.php
@@ -121,6 +121,8 @@ function mail_encode_address($string,$header='',$names=true){
       if(!utf8_isASCII($text)){
         $text = '=?UTF-8?Q?'.mail_quotedprintable_encode($text).'?=';
       }
+    }else{
+      $text = '';
     }
 
     // add to header comma seperated and in new line to avoid too long headers