Suppress bogus report
diff --git a/tools/tsan_suppressions.txt b/tools/tsan_suppressions.txt
index 65e7e2e..09e68cd 100644
--- a/tools/tsan_suppressions.txt
+++ b/tools/tsan_suppressions.txt
@@ -5,4 +5,4 @@
 # https://www.mail-archive.com/openssl-dev@openssl.org/msg09019.html
 race:ssleay_rand_add
 race:ssleay_rand_bytes
-
+race:__sleep_for