1 files changed, 5 insertions, 0 deletions
diff --git a/openxc.proto b/openxc.proto
index c2b7f7c2..3b23be5c 100644
--- a/openxc.proto
+++ b/openxc.proto
@@ -16,9 +16,14 @@ message VehicleMessage {
 }
 
 message RawMessage {
+    enum FrameFormat {
+        STANDARD = 1;
+        EXTENDED = 2;
+    }
     optional int32 bus = 1;
     optional uint32 message_id = 2;
     optional bytes data = 3;
+    optional FrameFormat format = 4;
 }
 
 message ControlCommand {