diff --git a/example/ding-dong-bot.ts b/example/ding-dong-bot.ts
index 74c64017ecf137426434afb70cc6ce279437b078..526e7e8d3e6223e11c2bba268a865a6ec4890762 100644
--- a/example/ding-dong-bot.ts
+++ b/example/ding-dong-bot.ts
@@ -84,8 +84,8 @@ bot.init()
   process.exit(-1)
 })
 
-finis((code, reason) => {
-  const exitMsg = `Wechaty exit ${code} because of ${reason} `
+finis((code, signal) => {
+  const exitMsg = `Wechaty exit ${code} because of ${signal} `
   console.log(exitMsg)
   bot.say(exitMsg)
 })