diff --git a/log.capnp b/log.capnp
index f54da14..1dea876 100644
--- a/log.capnp
+++ b/log.capnp
@@ -1967,6 +1967,7 @@ struct NavRoute {
 struct MapRenderState {
   locationMonoTime @0 :UInt64;
   renderTime @1 :Float32;
+  frameId @2: UInt32;
 }
 
 struct NavModelData {