diff --git a/History.markdown b/History.markdown
index 5a9c97cbd..3eca675d4 100644
--- a/History.markdown
+++ b/History.markdown
@@ -139,6 +139,7 @@
   * Utilize absolute paths of user-provided file paths (#7450)
   * Cache globbed paths in front matter defaults (#7345)
   * Cache computed item property (#7301)
+  * Memoize Document#excerpt_separator (#7569)
 
 ### Major Enhancements