diff --git a/resources/templates/provision/yealink/t27g/y000000000069.cfg b/resources/templates/provision/yealink/t27g/y000000000069.cfg
index 986ff6e835..a2b327e5d2 100644
--- a/resources/templates/provision/yealink/t27g/y000000000069.cfg
+++ b/resources/templates/provision/yealink/t27g/y000000000069.cfg
@@ -1056,7 +1056,7 @@ local.dsskey_type_config.mode =
 #######################################################################################
 #Enable or disable the phone to only accept the certificates in the Trusted Certificates list;
 #0-Disabled, 1-Enabled (default);
-security.trust_certificates = {if $trusted_cert_only == "false"}0{elseif $trusted_cert_only == "true"}1{/if}
+security.trust_certificates = {if $yealink_trust_certificates == "false"}0{elseif $yealink_trust_certificates == "true"}1{/if}
 
 #Define the login username and password of the user, var and administrator.
 #If you change the username of the administrator from "admin" to "admin1", your new administrator's username should be configured as: security.user_name.admin = admin1.