diff --git a/man/kernel-command-line.xml b/man/kernel-command-line.xml
index 00fb6f6c0d..4ab76487df 100644
--- a/man/kernel-command-line.xml
+++ b/man/kernel-command-line.xml
@@ -335,6 +335,18 @@
         </listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><varname>mount.usr=</varname></term>
+        <term><varname>mount.usrfstype=</varname></term>
+        <term><varname>mount.usrflags=</varname></term>
+
+        <listitem>
+          <para>Configures the /usr file system (if required) and
+          its file system type and mount options. For details, see
+          <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
+        </listitem>
+      </varlistentry>
+
       <varlistentry>
         <term><varname>roothash=</varname></term>
         <term><varname>systemd.verity=</varname></term>