diff --git a/transport/internet/config.proto b/transport/internet/config.proto
index d23b5a6bd..139ef83cc 100644
--- a/transport/internet/config.proto
+++ b/transport/internet/config.proto
@@ -47,7 +47,11 @@ message StreamConfig {
   SocketConfig socket_settings = 6;
 }
 
-message ProxyConfig { string tag = 1; }
+message ProxyConfig {
+  string tag = 1;
+
+  bool transportLayerProxy = 2;
+}
 
 // SocketConfig is options to be applied on network sockets.
 message SocketConfig {