diff --git a/templates/repo/diff/box.tmpl b/templates/repo/diff/box.tmpl
index 6c1ae2e447b10..4b964ebe1dc6c 100644
--- a/templates/repo/diff/box.tmpl
+++ b/templates/repo/diff/box.tmpl
@@ -1,6 +1,6 @@
 {{if .DiffNotAvailable}}
-	<div class="diff-detail-box diff-box ui sticky">
-		<div>
+	<div class="diff-detail-box diff-box ui">
+		<div class=“diff-header sticky”>
 			<div class="ui right">
 				{{if .PageIsPullFiles}}
 					{{template "repo/diff/whitespace_dropdown" .}}
@@ -16,8 +16,8 @@
 	</div>
 	<h4>{{.i18n.Tr "repo.diff.data_not_available"}}</h4>
 {{else}}
-	<div class="diff-detail-box diff-box ui sticky">
-		<div>
+	<div class="diff-detail-box diff-box ui">
+		<div class=“diff-header sticky”>
 			<i class="fa fa-retweet"></i>
 			{{.i18n.Tr "repo.diff.stats_desc" .Diff.NumFiles .Diff.TotalAddition .Diff.TotalDeletion | Str2html}}
 			<div class="ui right">