diff --git a/Commands.md b/Commands.md
index 744690e..f84ad5a 100644
--- a/Commands.md
+++ b/Commands.md
@@ -236,7 +236,7 @@ $ git effort --above 5
   If you wish to see only the commits in the last month you may use `--since` (it supports the same syntax like `git log --since`):
 
 ```
- $ git effort --since='last month'
+ $ git effort -- --since='last month'
 ```
 
   By default `git ls-files` is used, however you may pass one or more files to `git-effort(1)`, for example: