diff --git a/man/userdbctl.xml b/man/userdbctl.xml
index 3c26ce3024..522c6c665f 100644
--- a/man/userdbctl.xml
+++ b/man/userdbctl.xml
@@ -71,6 +71,16 @@
         </listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><option>--json=</option><replaceable>FORMAT</replaceable></term>
+
+        <listitem><para>Selects JSON out mode (like <option>--output=json</option>) and selects the precise
+        display mode. Takes one of <literal>pretty</literal> or <literal>short</literal>. If
+        <literal>pretty</literal> human-friendly whitespace and newlines are inserted in the output to make
+        the JSON data more readable. If <literal>short</literal> all superfluous whitespace is
+        suppressed.</para></listitem>
+      </varlistentry>
+
       <varlistentry>
         <term><option>--service=</option><replaceable>SERVICE</replaceable><optional>:<replaceable>SERVICE…</replaceable></optional></term>
         <term><option>-s</option> <replaceable>SERVICE</replaceable>:<replaceable>SERVICE…</replaceable></term>