diff --git a/man/journalctl.xml b/man/journalctl.xml
index f6703b06d6..46b22be699 100644
--- a/man/journalctl.xml
+++ b/man/journalctl.xml
@@ -749,6 +749,18 @@
         </para></listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><option>--namespace=<replaceable>NAMESPACE</replaceable></option></term>
+
+        <listitem><para>Takes a journal namespace identifier string as argument. If not specified the data
+        collected by the default namespace is shown. If specified shows the log data of the specified
+        namespace instead. If the namespace is specified as <literal>*</literal> data from all namespaces is
+        shown, interleaved. If the namespace identifier is prefixed with <literal>+</literal> data from the
+        specified namespace and the default namespace is shown, interleaved, but no other. For details about
+        journal namespaces see
+        <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para></listitem>
+      </varlistentry>
+
       <varlistentry>
         <term><option>--header</option></term>