diff --git a/Usage.md b/Usage.md
index 0f917da..570c2f5 100644
--- a/Usage.md
+++ b/Usage.md
@@ -195,6 +195,7 @@ optional args:
  -U      show user and group
  -V      show version
  -x      notis, selection sync, xterm title
+ -0      use null separator in picker mode
  -h      show help
 ```