diff --git a/man/systemd-soft-reboot.service.xml b/man/systemd-soft-reboot.service.xml
index f2bbd814684..5960cf90a6c 100644
--- a/man/systemd-soft-reboot.service.xml
+++ b/man/systemd-soft-reboot.service.xml
@@ -119,7 +119,9 @@
processes running during a soft-reboot operation requires disconnecting the service comprehensively from
the rest of the OS, i.e. minimizing IPC and reducing sharing of resources with the rest of the OS. A
possible mechanism to achieve this is the concept of Portable Services.
+ url="https://systemd.io/PORTABLE_SERVICES">Portable Services, but make sure no resource from
+ the host's root filesystem is pinned via BindPaths= or similar unit settings,
+ otherwise the old root filesystem will be kept in memory as long as the unit is running.
If units shall be left running until the very end of shutdown during a soft reboot operation, but
shall be terminated regularly during other forms of shutdown, it's recommended to set