diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index 86cdb4e124..7e87865ba8 100644
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -595,9 +595,8 @@
         order to trigger an orderly shutdown of the
         container. Defaults to SIGRTMIN+3 if <option>--boot</option>
         is used (on systemd-compatible init systems SIGRTMIN+3
-        triggers an orderly shutdown). Takes a signal name like
-        <literal>SIGHUP</literal>, <literal>SIGTERM</literal> or
-        similar as argument.</para></listitem>
+        triggers an orderly shutdown). For a list of valid signals, see
+        <citerefentry project='man-pages'><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para></listitem>
       </varlistentry>
 
       <varlistentry>
diff --git a/man/systemd.nspawn.xml b/man/systemd.nspawn.xml
index c07a4b0243..5ec878512a 100644
--- a/man/systemd.nspawn.xml
+++ b/man/systemd.nspawn.xml
@@ -223,6 +223,18 @@
         all cases.</para></listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><option>KillSignal=</option></term>
+
+        <listitem><para>Specify the process signal to send to the
+        container's PID 1 when nspawn itself receives SIGTERM, in
+        order to trigger an orderly shutdown of the container.
+        Defaults to SIGRTMIN+3 if <option>Boot=</option> is used
+        (on systemd-compatible init systems SIGRTMIN+3 triggers an
+        orderly shutdown). For a list of valid signals, see
+        <citerefentry project='man-pages'><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para></listitem>
+      </varlistentry>
+
       <varlistentry>
         <term><varname>Personality=</varname></term>