diff --git a/doc/src/sgml/ref/refresh_materialized_view.sgml b/doc/src/sgml/ref/refresh_materialized_view.sgml
index 8f59bbf1231..b5f22f5fd93 100644
--- a/doc/src/sgml/ref/refresh_materialized_view.sgml
+++ b/doc/src/sgml/ref/refresh_materialized_view.sgml
@@ -31,7 +31,8 @@ REFRESH MATERIALIZED VIEW <replaceable class="PARAMETER">name</replaceable>
 
   <para>
    <command>REFRESH MATERIALIZED VIEW</command> completely replaces the
-   contents of a materialized view.  The old contents are discarded.  If
+   contents of a materialized view.  To execute this command you must be the
+   owner of the materialized view.  The old contents are discarded.  If
    <literal>WITH DATA</literal> is specified (or defaults) the backing query
    is executed to provide the new data, and the materialized view is left in a
    scannable state.  If <literal>WITH NO DATA</literal> is specified no new