diff --git a/src/workflow/ArcanistWorkflow.php b/src/workflow/ArcanistWorkflow.php
--- a/src/workflow/ArcanistWorkflow.php
+++ b/src/workflow/ArcanistWorkflow.php
@@ -1006,7 +1006,7 @@
   }
 
   final protected function shouldRequireCleanUntrackedFiles() {
-    return empty($this->arguments['allow-untracked']);
+    return empty($this->getArgument('allow-untracked'));
   }
 
   final public function setCommitMode($mode) {