diff --git a/docs/MOUNT_REQUIREMENTS.md b/docs/MOUNT_REQUIREMENTS.md
index 470a5d65ee..c75f7e812d 100644
--- a/docs/MOUNT_REQUIREMENTS.md
+++ b/docs/MOUNT_REQUIREMENTS.md
@@ -10,6 +10,9 @@ SPDX-License-Identifier: LGPL-2.1-or-later
 This document describes the requirements placed by systemd
 on the time when various parts of the file system hierarchy
 must be available and mounted during boot.
+This document should be read in conjunction with
+[Linux File System Hierarchy](https://uapi-group.org/specifications/specs/linux_file_system_hierarchy/),
+which describes the role of the mount points discussed here.
 
 If the file system backing a mount point is located on external or remote media
 that require special drivers, infrastructure or networking to be set up,