diff --git a/doc/src/sgml/ref/pg_waldump.sgml b/doc/src/sgml/ref/pg_waldump.sgml
index ce23add5577..d1715ff5124 100644
--- a/doc/src/sgml/ref/pg_waldump.sgml
+++ b/doc/src/sgml/ref/pg_waldump.sgml
@@ -22,8 +22,8 @@ PostgreSQL documentation
  <refsynopsisdiv>
   <cmdsynopsis>
    <command>pg_waldump</command>
-   <arg rep="repeat" choice="opt"><option>option</option></arg>
-   <arg choice="opt"><option>startseg</option><arg choice="opt"><option>endseg</option></arg></arg>
+   <arg rep="repeat" choice="opt"><replaceable>option</replaceable></arg>
+   <arg choice="opt"><replaceable>startseg</replaceable><arg choice="opt"><replaceable>endseg</replaceable></arg></arg>
   </cmdsynopsis>
  </refsynopsisdiv>