diff --git a/source/guide/computed.md b/source/guide/computed.md
index bf306b732f..b49f5ae26b 100644
--- a/source/guide/computed.md
+++ b/source/guide/computed.md
@@ -82,7 +82,7 @@ var vm = new Vue({
     msg: 'hi'
   },
   computed: {
-    example: {
+    example: function () {
       return Date.now() + this.msg
     }
   }