diff --git a/service-mesh-probe/service-mesh.proto b/service-mesh-probe/service-mesh.proto
index b54ff95328dd64adceec152a73803bf7dd12bad7..5cbbfa0b8eaebcbf4df1d5d662e577f5a7c2482a 100644
--- a/service-mesh-probe/service-mesh.proto
+++ b/service-mesh-probe/service-mesh.proto
@@ -48,6 +48,7 @@ message ServiceMeshMetric {
     bool status = 10;
     Protocol protocol = 11;
     DetectPoint detectPoint = 12;
+    string tlsMode = 13;
 }
 
 enum Protocol {