diff --git a/BUILD.gn b/BUILD.gn
index 8586723304d0793ebeb9c7c025be2bfbe11c12c9..6e9ef99a574f979a43c5c721054cab73262c0179 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -16,6 +16,7 @@ config("crypto_config") {
   ]
   cflags = [
     "-Wall",
+    "-Wno-implicit-fallthrough",
     "-pthread",
     "-fPIC",
     "-Wa,--noexecstack",