diff --git a/doc/src/sgml/ref/create_materialized_view.sgml b/doc/src/sgml/ref/create_materialized_view.sgml
index 0d2fea2b97..2fdc210c27 100644
--- a/doc/src/sgml/ref/create_materialized_view.sgml
+++ b/doc/src/sgml/ref/create_materialized_view.sgml
@@ -163,6 +163,17 @@ CREATE MATERIALIZED VIEW [ IF NOT EXISTS ] <replaceable>table_name</replaceable>
   </variablelist>
  </refsect1>
 
+ <refsect1>
+  <title>Notes</title>
+
+  <para>
+   Unless <command>WITH NO DATA</command> is used, the <xref
+   linkend="guc-search-path"/> is temporarily changed to
+   <literal>pg_catalog, pg_temp</literal> while
+   <command>CREATE MATERIALIZED VIEW</command> is running.
+  </para>
+ </refsect1>
+
  <refsect1>
   <title>Compatibility</title>