diff --git a/tools/tsan_suppressions.txt b/tools/tsan_suppressions.txt
index 765fa098f92..e0c79072288 100644
--- a/tools/tsan_suppressions.txt
+++ b/tools/tsan_suppressions.txt
@@ -6,6 +6,8 @@ race:cleanse_ctr
 race:ssleay_rand_add
 race:ssleay_rand_bytes
 race:__sleep_for
-# protobuf has an idempotent write race in ByteSize
+# protobuf has an idempotent write race in ByteSize/GetCachedSize
 # https://github.com/google/protobuf/issues/2169
 race:ByteSize
+race:ByteSizeLong
+race:GetCachedSize