diff --git a/bin/sau b/bin/sau
index f8286e8..06d9928 100755
--- a/bin/sau
+++ b/bin/sau
@@ -124,7 +124,7 @@ def main():
         elif reboot_recommended:
             log.info('Rebooting because service restarts did not close all deleted files')
         if reboot_required or reboot_recommended:
-            fork_and_reboot(report_success=conf.getboolean('default', 'reboot_is_success', Fallback=True))
+            fork_and_reboot(report_success=conf.getboolean('default', 'reboot_is_success', fallback=True))
 
     if reboot_required:
         log.warning("Upgrade was success, but a reboot is required due to a system upgrade")