diff --git a/BUILD b/BUILD
index c91c14798c76661b027511f0c4525242be9687f1..b3f16f72f74881669958977ced108c1935b9c686 100644
--- a/BUILD
+++ b/BUILD
@@ -628,6 +628,7 @@ grpc_cc_library(
         "src/core/lib/json/json_common.h",
         "src/core/lib/json/json_reader.h",
         "src/core/lib/json/json_writer.h",
+        "src/core/lib/security/util/b64.h",
         "src/core/lib/slice/percent_encoding.h",
         "src/core/lib/slice/slice_hash_table.h",
         "src/core/lib/slice/slice_internal.h",