diff --git a/resources/templates/provision/yealink/t46s/y000000000066.cfg b/resources/templates/provision/yealink/t46s/y000000000066.cfg
index fb403f2fa7..ba83765b7c 100644
--- a/resources/templates/provision/yealink/t46s/y000000000066.cfg
+++ b/resources/templates/provision/yealink/t46s/y000000000066.cfg
@@ -611,8 +611,8 @@ static.sip.nat_turn.server=
 static.sip.nat_turn.port=
 
 static.sip.nat_stun.enable=
-static.sip.nat_stun.server=
-static.sip.nat_stun.port=
+static.sip.nat_stun.server = {$stun_server}
+static.sip.nat_stun.port = {if isset($stun_port)}{$stun_port}{else}3478{/if}
 
 
 static.ice.enable=