update
diff --git a/build.yaml b/build.yaml
index c0886ae..d2ea16c 100644
--- a/build.yaml
+++ b/build.yaml
@@ -28,6 +28,7 @@
   - src/core/ext/census/gen/trace_context.pb.h
   - src/core/ext/census/grpc_filter.h
   - src/core/ext/census/intrusive_hash_map.h
+  - src/core/ext/census/intrusive_hash_map_internal.h
   - src/core/ext/census/mlog.h
   - src/core/ext/census/resource.h
   - src/core/ext/census/rpc_metric_id.h