diff --git a/doc/src/sgml/release-9.5.sgml b/doc/src/sgml/release-9.5.sgml
index d5b68e73ef..92443e43c1 100644
--- a/doc/src/sgml/release-9.5.sgml
+++ b/doc/src/sgml/release-9.5.sgml
@@ -152,6 +152,22 @@
+
+
+ The configuration parameter checkpoint_segments has
+ been removed. Its place is taken by the new
+ setting . If you had previously
+ tuned checkpoint_segments, the following formula will
+ give you an approximately equivalent setting:
+
+max_wal_size = (3 * checkpoint_segments) * 16MB
+
+ Note that the default setting for max_wal_size is
+ much higher than the default checkpoint_segments used
+ to be, so setting this might no longer be necessary.
+
+
+