diff --git a/Readme.md b/Readme.md
index f37f58bf9..1b66d48ae 100644
--- a/Readme.md
+++ b/Readme.md
@@ -60,6 +60,7 @@ $ brew bundle dump
 ```
 
 The `--force` option will allow an existing `Brewfile` to be overwritten as well.
+The `--describe` option will output a description comment above each line.
 
 ### Cleanup