diff --git a/man/systemctl.xml b/man/systemctl.xml
index b287d7ac84c..e971b3422a4 100644
--- a/man/systemctl.xml
+++ b/man/systemctl.xml
@@ -230,8 +230,10 @@ along with systemd; If not, see .
If replace-irreversibly is specified,
operate like replace, but also mark the new
jobs as irreversible. This prevents future conflicting
- transactions from replacing these jobs. The jobs can still be
- cancelled using the cancel command.
+ transactions from replacing these jobs (or even being enqueued
+ while the irreversible jobs are still pending). Irreversible
+ jobs can still be cancelled using the cancel
+ command.
isolate is only valid for start
operations and causes all other units to be stopped when the