diff --git a/htdocs/lib/dolibarrmail.class.php b/htdocs/lib/dolibarrmail.class.php
index 85fb1d5d0c0..2928c076868 100644
--- a/htdocs/lib/dolibarrmail.class.php
+++ b/htdocs/lib/dolibarrmail.class.php
@@ -214,8 +214,7 @@ class DolibarrMail
     if (count($filename_list))
       {
 	$out = "--" . $this->mime_boundary . "\n";
-	$out = $out . "Content-Type: text/plain; charset=\"iso8859-15\"\n\n";
-	//	  $out = $out . "Content-Type: text/plain; charset=\"us-ascii\"\n\n";
+	$out = $out . "Content-Type: text/plain; charset=\"iso-8859-15\"\n\n";
       }
     else
       {