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diff --git a/man/systemd.service.xml b/man/systemd.service.xml
index 7b6f12d06..a1d8a523e 100644
--- a/man/systemd.service.xml
+++ b/man/systemd.service.xml
@@ -459,6 +459,30 @@
                                 90s.</para></listitem>
                         </varlistentry>
 
+                        <varlistentry>
+                                <term><varname>WatchdogSec=</varname></term>
+                                <listitem><para>Configures the
+                                watchdog timeout for a service. This
+                                is activated when the start-up is
+                                completed. The service must call
+                                <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+                                regularly with "WATCHDOG=1". If the
+                                time between two such calls is larger
+                                than the configured time then the
+                                service is placed in a failure
+                                state. By setting
+                                <term><varname>Restart=</varname></term>
+                                to <option>on-failure</option> or
+                                <option>always</option> the service
+                                will be automatically restarted. The
+                                time configured here will be passed to
+                                the executed service process in the
+                                <varname>WATCHDOG_USEC=</varname>
+                                environment variable. Defaults to 0s,
+                                which disables this
+                                feature.</para></listitem>
+                        </varlistentry>
+
                         <varlistentry>
                                 <term><varname>Restart=</varname></term>
                                 <listitem><para>Configures whether the
@@ -671,11 +695,11 @@
                                 <listitem><para>Specifies the name of
                                 the socket units this service shall
                                 inherit the sockets from when the
-                                service (ignoring the different suffix
-                                of course) is started. Normally it
+                                service is started. Normally it
                                 should not be necessary to use this
                                 setting as all sockets whose unit
                                 shares the same name as the service
+                                (ignoring the different suffix of course)
                                 are passed to the spawned
                                 process.</para>