diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index bdc2ab54845..038744a27fc 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -13238,9 +13238,10 @@ strict $.**.HR
      is a JSON path string literal, written according to the rules given in
      <xref linkend="datatype-jsonpath"/>.  This means in particular that any
      backslashes you want to use in the regular expression must be doubled.
-     For example, to match strings that contain only digits:
+     For example, to match string values of the root document that contain
+     only digits:
 <programlisting>
-'$ ? (@ like_regex "^\\d+$")'
+$.* ? (@ like_regex "^\\d+$")
 </programlisting>
     </para>