diff --git a/man/file-hierarchy.xml b/man/file-hierarchy.xml
index 4220520a1f..3e28fc6bee 100644
--- a/man/file-hierarchy.xml
+++ b/man/file-hierarchy.xml
@@ -57,7 +57,7 @@
system and service manager are organized based on a file system
hierarchy inspired by UNIX, more specifically the hierarchy
described in the File
+ url="http://refspecs.linuxfoundation.org/FHS_3.0/fhs-3.0.html">File
System Hierarchy specification and
hier7.
This manual page describes a more minimal, modernized subset of