diff --git a/lang/en/message.php b/lang/en/message.php
index 8885756c425..6a510c74adc 100644
--- a/lang/en/message.php
+++ b/lang/en/message.php
@@ -8,7 +8,7 @@ $string['allmine'] = 'All messages to me or from me';
 $string['allstudents'] = 'All messages between students in course';
 $string['allusers'] = 'All messages from all users';
 $string['backupmessageshelp'] = 'If enabled, then instant messages will be included in SITE automated backups';
-$string['beepnewmessage'] = 'Beep when a new message comes in';
+$string['beepnewmessage'] = 'Beep when a new message comes in (may require browser plugin that can play sounds, such as Quicktime)';
 $string['blockcontact'] = 'Block contact';
 $string['blocknoncontacts'] = 'Block all new messages from people who are not on my contact list';
 $string['blockedmessages'] = '$a message(s) to/from blocked users';