diff --git a/History.markdown b/History.markdown
index b1188f76..eb08f73b 100644
--- a/History.markdown
+++ b/History.markdown
@@ -2,6 +2,7 @@
 
 ### Bug Fixes
 
+  * Document: only superdirectories of the collection are categories (#4110)
   * `Convertible#render_liquid` should use `render!` to cause failure on bad Liquid (#4077)
   * Don't generate `.jekyll-metadata` in non-incremental build (#4079)
   * Set `highlighter` config val to `kramdown.syntax_highlighter` (#4090)