diff --git a/BUILD b/BUILD
index 6dcc76eb7aa..6552d5879e6 100644
--- a/BUILD
+++ b/BUILD
@@ -725,6 +725,7 @@ grpc_cc_library(
         "src/core/lib/iomgr/is_epollexclusive_available.h",
         "src/core/lib/iomgr/load_file.h",
         "src/core/lib/iomgr/lockfree_event.h",
+        "src/core/lib/iomgr/nameser.h",
         "src/core/lib/iomgr/network_status_tracker.h",
         "src/core/lib/iomgr/polling_entity.h",
         "src/core/lib/iomgr/pollset.h",