DOC: Mention -Ws in the list of available options
diff --git a/doc/management.txt b/doc/management.txt
index af21652..1488862 100644
--- a/doc/management.txt
+++ b/doc/management.txt
@@ -176,6 +176,10 @@
is compatible either with the foreground or daemon mode. It is
recommended to use this mode with multiprocess and systemd.
+ -Ws : master-worker mode with support of `notify` type of systemd service.
+ This option is only available when HAProxy was built with `USE_SYSTEMD`
+ build option enabled.
+
-c : only performs a check of the configuration files and exits before trying
to bind. The exit status is zero if everything is OK, or non-zero if an
error is encountered.