diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index f0155eef7f5..8f9035f008b 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1647,6 +1647,10 @@ repeat('Pg', 4) <returnvalue>PgPgPgPg</returnvalue>
        <para>
         <literal>round(42.4382, 2)</literal>
         <returnvalue>42.44</returnvalue>
+       </para>
+       <para>
+        <literal>round(1234.56, -1)</literal>
+        <returnvalue>1230</returnvalue>
        </para></entry>
       </row>