diff --git a/doc/src/sgml/ref/pg_waldump.sgml b/doc/src/sgml/ref/pg_waldump.sgml
index 4e86f44c5b..1a05af5d97 100644
--- a/doc/src/sgml/ref/pg_waldump.sgml
+++ b/doc/src/sgml/ref/pg_waldump.sgml
@@ -85,7 +85,7 @@ PostgreSQL documentation
        <para>
         Only display records that modify the given block.  The relation must
         also be provided with <option>--relation</option> or
-        <option>-l</option>.
+        <option>-R</option>.
        </para>
       </listitem>
      </varlistentry>