diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index d96630048..a450ce7e7 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -8,6 +8,7 @@ Changelog
  * Use minified versions of CSS in the admin by adding minification to the front-end tooling (Vincent Audebert, Thibaud Colas)
  * Wagtailforms serve view now passes `request.FILES`, for use in custom form handlers (LB (Ben Johnston))
  * Documents and images are now given new filenames on re-uploading, to avoid old versions being kept in cache (Bertrand Bordage)
+ * Added custom 404 page for admin interface (Jack Paine)
  * Fix: "Open Link in New Tab" on a right arrow in page explorer should open page list (Emily Horsman)
  * Fix: Using `order_by_relevance=False` when searching with PostgreSQL now works (Mitchel Cabuloy)
  * Fix: Inline panel first and last sorting arrows correctly hidden in non-default tabs (Matt Westcott)
diff --git a/docs/releases/1.13.rst b/docs/releases/1.13.rst
index 26d7c1772..ea1025ba4 100644
--- a/docs/releases/1.13.rst
+++ b/docs/releases/1.13.rst
@@ -18,6 +18,7 @@ Other features
  * Use minified versions of CSS in the admin by adding minification to the front-end tooling (Vincent Audebert, Thibaud Colas)
  * Wagtailforms serve view now passes ``request.FILES``, for use in custom form handlers (LB (Ben Johnston))
  * Documents and images are now given new filenames on re-uploading, to avoid old versions being kept in cache (Bertrand Bordage)
+ * Added custom 404 page for admin interface (Jack Paine)
 
 
 Bug fixes