diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 9c551c0d1..41a976473 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -5,6 +5,7 @@ Changelog
 ~~~~~~~~~~~~~~~~~~
 
  * Fix: Pin Beautiful Soup to 4.6.0 due to further regressions in formatting empty elements (Matt Westcott)
+ * Fix: Prevent AppRegistryNotReady error when wagtail.contrib.sitemaps is in INSTALLED_APPS (Matt Westcott)
 
 
 2.2 (10.08.2018)
diff --git a/docs/releases/2.2.1.rst b/docs/releases/2.2.1.rst
index e2b112885..72feb8454 100644
--- a/docs/releases/2.2.1.rst
+++ b/docs/releases/2.2.1.rst
@@ -14,3 +14,4 @@ Bug fixes
 ~~~~~~~~~
 
  * Pin Beautiful Soup to 4.6.0 due to further regressions in formatting empty elements (Matt Westcott)
+ * Prevent AppRegistryNotReady error when wagtail.contrib.sitemaps is in INSTALLED_APPS (Matt Westcott)