diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 955d4d6586..a3ee04aa7f 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -35,6 +35,7 @@ Changelog
  * Fix: Admin breadcrumbs home icon now shows for users with access to a subtree only (Stefan Hammer)
  * Fix: Add handling of invalid inline styles submitted to `RichText` so `ConfigException` is not thrown (Alex Tomkins)
  * Fix: Ensure comment notifications dropdown handles longer translations without overflowing content (Krzysztof Jeziorny)
+ * Fix: Set `default_auto_field` in `postgres_search` `AppConfig` (Nick Moreton)
 
 
 2.14.1 (12.08.2021)
diff --git a/CONTRIBUTORS.rst b/CONTRIBUTORS.rst
index 3e26ac21f6..9342d628cf 100644
--- a/CONTRIBUTORS.rst
+++ b/CONTRIBUTORS.rst
@@ -537,6 +537,7 @@ Contributors
 * Justin Slay
 * Desai Akshata
 * Krzysztof Jeziorny
+* Nick Moreton
 
 Translators
 ===========
diff --git a/docs/releases/2.15.rst b/docs/releases/2.15.rst
index 5e595f9752..310127d2e3 100644
--- a/docs/releases/2.15.rst
+++ b/docs/releases/2.15.rst
@@ -50,6 +50,7 @@ Bug fixes
  * Admin breadcrumbs home icon now shows for users with access to a subtree only (Stefan Hammer)
  * Add handling of invalid inline styles submitted to ``RichText`` so ``ConfigException`` is not thrown (Alex Tomkins)
  * Ensure comment notifications dropdown handles longer translations without overflowing content (Krzysztof Jeziorny)
+ * Set ``default_auto_field`` in ``postgres_search`` ``AppConfig`` (Nick Moreton)
 
 Upgrade considerations
 ======================