diff --git a/git-branch.md b/git-branch.md
index c35f70ca9..bc715c699 100644
--- a/git-branch.md
+++ b/git-branch.md
@@ -80,7 +80,7 @@ git reset --hard
 ### Undo commits to a specific commit
 
 ```bash
-git reset --hard $commitID
+git reset --hard $commit_id
 
 # Now push to your branch
 git push --force