diff --git a/doc/src/sgml/ref/grant.sgml b/doc/src/sgml/ref/grant.sgml
index 51dd2e05e7..c5edaed153 100644
--- a/doc/src/sgml/ref/grant.sgml
+++ b/doc/src/sgml/ref/grant.sgml
@@ -630,6 +630,12 @@ GRANT admins TO joe;
     <quote>_SYSTEM</>, the owner cannot revoke these rights.
    </para>
 
+   <para>
+    According to the SQL standard, grant options can be granted to
+    <literal>PUBLIC</literal>; PostgreSQL only supports granting grant options
+    to roles.
+   </para>
+
    <para>
     The SQL standard provides for a <literal>USAGE</literal> privilege
     on other kinds of objects: character sets, collations,