diff --git a/src/workflow/ArcanistLandWorkflow.php b/src/workflow/ArcanistLandWorkflow.php
--- a/src/workflow/ArcanistLandWorkflow.php
+++ b/src/workflow/ArcanistLandWorkflow.php
@@ -118,7 +118,7 @@
 after the process finishes. The working copy is put into that state.
 
 Any obsolete refs that point at commits which were published are deleted,
-unless the **--keep-branch** flag is passed.
+unless the **--keep-branches** flag is passed.
 EOTEXT
       );