diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index e4febee94..5dd062546 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -4,6 +4,7 @@ Changelog
 1.4 (xx.xx.xxxx)
 ~~~~~~~~~~~~~~~~
 
+ * Introduced collections, for image / document organisation
  * The page editor now produces a warning if the user navigates away without saving changes
  * 'Add document' interface now supports uploading multiple documents at once
  * The set of pages displayed in the page explorer can now be customised with a new hook called `construct_explorer_page_queryset`
diff --git a/docs/releases/1.4.rst b/docs/releases/1.4.rst
index 203db6fb9..3a74c99c1 100644
--- a/docs/releases/1.4.rst
+++ b/docs/releases/1.4.rst
@@ -10,6 +10,12 @@ Wagtail 1.4 release notes - IN DEVELOPMENT
 What's new
 ==========
 
+Collections for image / document organisation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Images and documents can now be organised into collections, set up by administrators through the Settings -> Collections menu item. User permissions can be set either globally (on the 'Root' collection) or on individual collections, allowing different user groups to keep their media items separated.
+
+
 Protection against unsaved changes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~