diff --git a/src/examples/src/cells/App/template.html b/src/examples/src/cells/App/template.html
index 23346b797f..f2835b2e8b 100644
--- a/src/examples/src/cells/App/template.html
+++ b/src/examples/src/cells/App/template.html
@@ -8,7 +8,7 @@
   <tbody>
     <tr v-for="i in cells[0].length">
       <th>{{ i - 1 }}</th>
-      <td v-for="c, j in cols">
+      <td v-for="(c, j) in cols">
         <Cell :r="i - 1" :c="j"></Cell>
       </td>
     </tr>