diff --git a/src/v2/guide/render-function.md b/src/v2/guide/render-function.md
index 011001b4d1..725c0f8ee6 100644
--- a/src/v2/guide/render-function.md
+++ b/src/v2/guide/render-function.md
@@ -299,6 +299,7 @@ render: function (createElement) {
     on: {
       input: function (event) {
         self.value = event.target.value
+        self.$emit('input', event.target.value)
       }
     }
   })