update
diff --git a/BUILD b/BUILD
index eac5e62..5620965 100644
--- a/BUILD
+++ b/BUILD
@@ -298,7 +298,7 @@
         "src/core/ext/census/gen/census.pb.h",
         "src/core/ext/census/gen/trace_context.pb.h",
         "src/core/ext/census/grpc_filter.h",
-        "src/core/ext/census/intrusive_hash_map.c",
+        "src/core/ext/census/intrusive_hash_map.h",
         "src/core/ext/census/mlog.h",
         "src/core/ext/census/resource.h",
         "src/core/ext/census/rpc_metric_id.h",