diff --git a/CHANGES b/CHANGES
index c6306a7d91..154ce717c3 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,6 +2,7 @@ OpenLDAP 2.5 Change Log
 
 OpenLDAP 2.5.5 Engineering
 	Fixed libldap double free of LDAP_OPT_DEFBASE (ITS#9530)
+	Fixed slapo-pcache locking during expiration (ITS#9529)
 
 OpenLDAP 2.5.4 Release (2021/04/29)
 	Initial release for "general use".