diff --git a/proto/decentraland/kernel/comms/rfc4/comms.proto b/proto/decentraland/kernel/comms/rfc4/comms.proto
index 83f098d3..317dd6ee 100644
--- a/proto/decentraland/kernel/comms/rfc4/comms.proto
+++ b/proto/decentraland/kernel/comms/rfc4/comms.proto
@@ -101,6 +101,8 @@ message ProfileResponse {
 message Chat {
   string message = 1;
   double timestamp = 2;
+  string message_id = 3;
+  optional string reply_to_message_id = 4;
 }
 
 message Scene {