diff --git a/kittens/clipboard/main.py b/kittens/clipboard/main.py
index 8adf6d850..ce39281e0 100644
--- a/kittens/clipboard/main.py
+++ b/kittens/clipboard/main.py
@@ -78,7 +78,7 @@ the kitten in a dedicated, ephemeral window.
 help_text = '''\
 Read or write to the system clipboard.
 
-To set the clipboard text, pipe in the new text on stdin. Use the
+To set the clipboard text, pipe in the new text on STDIN. Use the
 :option:`--get-clipboard` option to output the current clipboard contents to
 :file:`stdout`. Note that reading the clipboard will cause a permission
 popup, see :opt:`clipboard_control` for details.