diff --git a/htdocs/core/class/CMailFile.class.php b/htdocs/core/class/CMailFile.class.php
index 33db393bbc6..a8986475095 100644
--- a/htdocs/core/class/CMailFile.class.php
+++ b/htdocs/core/class/CMailFile.class.php
@@ -127,7 +127,7 @@ class CMailFile
 	 *	@param 	array	$filename_list       List of files to attach (full path of filename on file system)
 	 *	@param 	array	$mimetype_list       List of MIME type of attached files
 	 *	@param 	array	$mimefilename_list   List of attached file name in message
-	 *	@param 	string	$addr_cc             Email cc
+	 *	@param 	string	$addr_cc             Email cc (Example: 'abc@def.com, ghk@lmn.com')
 	 *	@param 	string	$addr_bcc            Email bcc (Note: This is autocompleted with MAIN_MAIL_AUTOCOPY_TO if defined)
 	 *	@param 	int		$deliveryreceipt     Ask a delivery receipt
 	 *	@param 	int		$msgishtml           1=String IS already html, 0=String IS NOT html, -1=Unknown make autodetection (with fast mode, not reliable)