diff --git a/endpoint/cisco/sip99xx/phone.php b/endpoint/cisco/sip99xx/phone.php
index 44b9d1f0..5a22dca0 100755
--- a/endpoint/cisco/sip99xx/phone.php
+++ b/endpoint/cisco/sip99xx/phone.php
@@ -37,6 +37,7 @@ class endpoint_cisco_sip99xx_phone extends endpoint_cisco_base {
 			'Australia/Adelaide'=>'Central Pacific Standard Time',
 			'Australia/Tasmania'=>'Tasmania Standard/Daylight Time',
 			'Australia/Perth'=>'W. Australia Standard Time',
+			'America/Buenos_Aires'=>'SA Eastern Standard Time',
 		),
 	);
 	function prepare_for_generateconfig() {