diff --git a/doc/src/sgml/system-views.sgml b/doc/src/sgml/system-views.sgml
index 9b8d07b2b71..328bdfdd152 100644
--- a/doc/src/sgml/system-views.sgml
+++ b/doc/src/sgml/system-views.sgml
@@ -2478,20 +2478,18 @@ SELECT * FROM pg_locks pl LEFT JOIN pg_prepared_xacts ppx
unreserved means that the slot no longer
retains the required WAL files and some of them are to be removed at
- the next checkpoint. This state can return
+ the next checkpoint. This typically occurs when
+ is set to
+ a non-negative value. This state can return
to reserved or extended.
- lost means that some required WAL files have
- been removed and this slot is no longer usable.
+ lost means that this slot is no longer usable.
- The last two states are seen only when
- is
- non-negative.