Fix #4647
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 471e78f..27b49f9 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -31,6 +31,7 @@
- Fixed a bug (#4613) - :doc:`Email Library <libraries/config>` failed to send multiple emails via SMTP due to "already authenticated" errors when keep-alive is enabled.
- Fixed a bug (#4633) - :doc:`Form Validation Library <libraries/form_validation>` ignored multiple "callback" rules for empty, non-required fields.
- Fixed a bug (#4637) - :doc:`Database <database/index>` method `error()` returned ``FALSE`` with the 'oci8' driver if there was no error.
+- Fixed a bug (#4647) - :doc:`Query Builder <database/query_builder>` method ``count_all_results()`` doesn't take into account ``GROUP BY`` clauses while deciding whether to do a subquery or not.
Version 3.0.6
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