diff --git a/units/dev-hugepages.mount b/units/dev-hugepages.mount
index 9381167c83..d711faed55 100644
--- a/units/dev-hugepages.mount
+++ b/units/dev-hugepages.mount
@@ -8,6 +8,7 @@
 [Unit]
 Description=Huge Pages File System
 Documentation=https://www.kernel.org/doc/Documentation/vm/hugetlbpage.txt
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 Before=sysinit.target
 ConditionPathExists=/sys/kernel/mm/hugepages
diff --git a/units/dev-mqueue.mount b/units/dev-mqueue.mount
index 5786bb1519..5c11ca7d35 100644
--- a/units/dev-mqueue.mount
+++ b/units/dev-mqueue.mount
@@ -8,6 +8,7 @@
 [Unit]
 Description=POSIX Message Queue File System
 Documentation=man:mq_overview(7)
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 Before=sysinit.target
 ConditionPathExists=/proc/sys/fs/mqueue
diff --git a/units/proc-sys-fs-binfmt_misc.automount b/units/proc-sys-fs-binfmt_misc.automount
index 7fd5afe3cd..6be38937b1 100644
--- a/units/proc-sys-fs-binfmt_misc.automount
+++ b/units/proc-sys-fs-binfmt_misc.automount
@@ -8,6 +8,7 @@
 [Unit]
 Description=Arbitrary Executable File Formats File System Automount Point
 Documentation=https://www.kernel.org/doc/Documentation/binfmt_misc.txt
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 Before=sysinit.target
 ConditionPathExists=/proc/sys/fs/binfmt_misc/
diff --git a/units/proc-sys-fs-binfmt_misc.mount b/units/proc-sys-fs-binfmt_misc.mount
index c64c84951e..8c7c386318 100644
--- a/units/proc-sys-fs-binfmt_misc.mount
+++ b/units/proc-sys-fs-binfmt_misc.mount
@@ -8,6 +8,7 @@
 [Unit]
 Description=Arbitrary Executable File Formats File System
 Documentation=https://www.kernel.org/doc/Documentation/binfmt_misc.txt
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 
 [Mount]
diff --git a/units/sys-fs-fuse-connections.mount b/units/sys-fs-fuse-connections.mount
index 9269ea4272..ebd93e2cda 100644
--- a/units/sys-fs-fuse-connections.mount
+++ b/units/sys-fs-fuse-connections.mount
@@ -8,6 +8,7 @@
 [Unit]
 Description=FUSE Control File System
 Documentation=https://www.kernel.org/doc/Documentation/filesystems/fuse.txt
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 ConditionPathExists=/sys/fs/fuse/connections
 After=systemd-modules-load.service
diff --git a/units/sys-kernel-config.mount b/units/sys-kernel-config.mount
index e7cd4909c1..020101c0d8 100644
--- a/units/sys-kernel-config.mount
+++ b/units/sys-kernel-config.mount
@@ -8,6 +8,7 @@
 [Unit]
 Description=Configuration File System
 Documentation=https://www.kernel.org/doc/Documentation/filesystems/configfs/configfs.txt
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 ConditionPathExists=/sys/kernel/config
 After=systemd-modules-load.service
diff --git a/units/sys-kernel-debug.mount b/units/sys-kernel-debug.mount
index 8b1e33e7f7..5369728a9f 100644
--- a/units/sys-kernel-debug.mount
+++ b/units/sys-kernel-debug.mount
@@ -8,6 +8,7 @@
 [Unit]
 Description=Debug File System
 Documentation=https://www.kernel.org/doc/Documentation/filesystems/debugfs.txt
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 ConditionPathExists=/sys/kernel/debug
 Before=sysinit.target
diff --git a/units/tmp.mount b/units/tmp.mount
index 94c41c29ba..99a3ba3f6c 100644
--- a/units/tmp.mount
+++ b/units/tmp.mount
@@ -8,6 +8,7 @@
 [Unit]
 Description=Temporary Directory
 Documentation=man:hier(7)
+Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
 DefaultDependencies=no
 Conflicts=umount.target
 Before=local-fs.target umount.target