diff --git a/htdocs/core/class/CMailFile.class.php b/htdocs/core/class/CMailFile.class.php
index 2958da93b99..c9dba9a0227 100644
--- a/htdocs/core/class/CMailFile.class.php
+++ b/htdocs/core/class/CMailFile.class.php
@@ -123,6 +123,13 @@ class CMailFile
 	{
 		global $conf, $dolibarr_main_data_root;
 
+		// Clean values of $mimefilename_list
+		if (is_array($mimefilename_list)) {
+			foreach($mimefilename_list as $key => $val) {
+				$mimefilename_list[$key] = dol_string_unaccent($mimefilename_list[$key]);
+			}
+		}
+
 		$this->sendcontext = $sendcontext;
 
 		if (empty($replyto)) $replyto=$from;