diff --git a/proxy/vlite/inbound/config.proto b/proxy/vlite/inbound/config.proto
index fb45e0af1..09584ad7a 100644
--- a/proxy/vlite/inbound/config.proto
+++ b/proxy/vlite/inbound/config.proto
@@ -6,9 +6,15 @@ option go_package = "github.com/v2fly/v2ray-core/v5/proxy/vlite/inbound";
 option java_package = "com.v2ray.core.proxy.vlite.inbound";
 option java_multiple_files = true;
 
+import "common/protoext/extensions.proto";
+
 message UDPProtocolConfig {
+  option (v2ray.core.common.protoext.message_opt).type = "inbound";
+  option (v2ray.core.common.protoext.message_opt).short_name = "vliteu";
+
   string password = 3;
   bool scramble_packet = 4;
   bool enable_fec = 5;
   bool enable_stabilization = 6;
+  uint32 handshake_masking_padding_size = 8;
 }
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