diff --git a/History.markdown b/History.markdown
index bb691bba..50c8d824 100644
--- a/History.markdown
+++ b/History.markdown
@@ -164,6 +164,7 @@
   * Document addition of variable parameters to an include (#3581)
   * Add `jekyll-files` to the list of third-party plugins. (#3586)
   * Define the `install` step in the CI example `.travis.yml` (#3622)
+  * Expand collections documentation. (#3638)
 
 ## 2.5.3 / 2014-12-22