diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index ba24698..7b1e1e3 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -21,6 +21,7 @@
 -  Fixed a bug (#5590) - :doc:`Form Validation Library <libraries/form_validation>` rule **valid_base64** didn't have a default error message.
 -  Fixed a bug (#5624) - :doc:`Database Library <database/index>` methods ``list_fields()``, ``field_exists()`` returned incorrect results after tables are modified.
 -  Fixed a bug (#5627) - :doc:`Database <database/index>` driver 'mysqli' triggered an ``E_WARNING`` message if there's no ``'port'`` specified in the database configuration.
+-  Fixed a bug (#5651) - :doc:`Database Caching <database/caching>` could try to delete non-existent cache files due to a race condition.
 
 Version 3.1.9
 =============