diff --git a/magit.el b/magit.el
index 21249b53..6f688f1b 100644
--- a/magit.el
+++ b/magit.el
@@ -532,6 +532,7 @@ pushed.
 	   (magit-run "git" "add" (magit-diff-info-file info)))))))
 
 (defun magit-unstage-thing-at-point ()
+  "Add the hunk under point to the staging area."
   (interactive)
   (let ((info (get-char-property (point) 'magit-info)))
     (if info