diff --git a/src/trigger/bot.js b/src/trigger/bot.js
index bf9d614..29f4c2b 100644
--- a/src/trigger/bot.js
+++ b/src/trigger/bot.js
@@ -20,7 +20,7 @@ module.exports = (lib) => {
       vm.runInNewContext('this.output = '+args, sandbox);
       
       var output = util.inspect(sandbox.output);
-      if(output !== undefined)
+      if(typeof(output) !== undefined)
         e.reply(output);
     },
     desc: 'bot debug'