diff --git a/storage/rocksdb/rocksdb/port/lang.h b/storage/rocksdb/rocksdb/port/lang.h
new file mode 100644
index 0000000000000000000000000000000000000000..a5fd364907c7da961d40a6e9ebd29609d5da3dcd
--- /dev/null
+++ b/storage/rocksdb/rocksdb/port/lang.h
@@ -0,0 +1,16 @@
+// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#pragma once
+
+#ifndef FALLTHROUGH_INTENDED
+#if defined(__clang__)
+#define FALLTHROUGH_INTENDED [[clang::fallthrough]]
+#elif defined(__GNUC__) && __GNUC__ >= 7
+#define FALLTHROUGH_INTENDED [[gnu::fallthrough]]
+#else
+#define FALLTHROUGH_INTENDED do {} while (0)
+#endif
+#endif