diff --git a/History.markdown b/History.markdown
index 94da8dcd..85ca98c6 100644
--- a/History.markdown
+++ b/History.markdown
@@ -88,6 +88,7 @@
 
   * Raise when theme root directory is not available (#6455)
   * Avoid block parser warning in SmartyPants (#6565)
+  * Fail gracefully if "sass" gem cannot be loaded (#6573)
 
 ## 3.6.2 / 2017-10-21