diff --git a/ndp_mtls.conf b/ndp_mtls.conf
index 9394dce..5701521 100644
--- a/ndp_mtls.conf
+++ b/ndp_mtls.conf
@@ -54,6 +54,7 @@ SSLVerifyClient optional_no_ca
     SetEnvIfNoCase Request_URI .*805e0c.*(log|xml|cfg) is_yealink_mac=1 is_mtls_mac=1
     SetEnvIfNoCase Request_URI .*805ec0.*(log|xml|cfg) is_yealink_mac=1 is_mtls_mac=1
     SetEnvIfNoCase Request_URI .*44dbd2.*(log|xml|cfg) is_yealink_mac=1 is_mtls_mac=1
+    SetEnvIfNoCase Request_URI .*c4fc22.*(log|xml|cfg) is_yealink_mac=1 is_mtls_mac=1
     #
     #
     # Panasonic