diff --git a/app/assets/javascripts/repo/repo_sidebar.vue b/app/assets/javascripts/repo/repo_sidebar.vue
index f7d276427cc4304edc7a93aa6fe362d698e215a7..bdaf77941950104381742de12dbffaf39d4ab851 100644
--- a/app/assets/javascripts/repo/repo_sidebar.vue
+++ b/app/assets/javascripts/repo/repo_sidebar.vue
@@ -96,6 +96,7 @@ export default RepoSidebar;
         @linkclicked="linkClicked(prevURL)"/>
       <repo-loading-file
         v-for="n in 5"
+        :key="n"
         :loading="loading"
         :has-files="!!files.length"
         :is-mini="isMini"/>