diff --git a/Usage.md b/Usage.md
index abdc2d6..02278e1 100644
--- a/Usage.md
+++ b/Usage.md
@@ -135,6 +135,7 @@ optional args:
  -S      persistent session
  -t secs timeout to lock
  -T key  sort order [a/d/e/r/s/t/v]
+ -u      use selection (no prompt)
  -V      show version
  -x      notis, sel to system clipboard
  -h      show help