diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 2811f11..cbaf264 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3796,8 +3796,7 @@ local0.*    /var/log/postgresql
         Valid values are <literal>DEBUG5</>,
         <literal>DEBUG4</>, <literal>DEBUG3</>, <literal>DEBUG2</>,
         <literal>DEBUG1</>, <literal>LOG</>, <literal>NOTICE</>,
-        <literal>WARNING</>, <literal>ERROR</>, <literal>FATAL</>,
-        and <literal>PANIC</>.  Each level
+        <literal>WARNING</>, and <literal>ERROR</>. Each level
         includes all the levels that follow it.  The later the level,
         the fewer messages are sent.  The default is
         <literal>NOTICE</>.  Note that <literal>LOG</> has a different
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index c76edb4..b7cfe14 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -242,8 +242,6 @@ static const struct config_enum_entry client_message_level_options[] = {
 	{"notice", NOTICE, false},
 	{"warning", WARNING, false},
 	{"error", ERROR, false},
-	{"fatal", FATAL, true},
-	{"panic", PANIC, true},
 	{NULL, 0, false}
 };