diff --git a/templates/repo/view_file.tmpl b/templates/repo/view_file.tmpl
index a3703f37d2..721c795617 100644
--- a/templates/repo/view_file.tmpl
+++ b/templates/repo/view_file.tmpl
@@ -36,7 +36,7 @@
 		</div>
 		<div class="file-header-right file-actions flex-text-block tw-flex-wrap">
 		{{if .FileSidebarHTML}}
-			<button class="btn-octicon" id="toggle-sidebar-btn" data-tooltip-content="{{ctx.Locale.Tr "toc"}}">{{svg "octicon-list-unordered"}}</button>
+			<button class="btn-octicon" id="toggle-sidebar-btn" data-tooltip-content="{{ctx.Locale.Tr "toc"}}">{{svg "octicon-list-unordered" 15}}</button>
 		{{end}}
 			{{/* this componment is also controlled by frontend plugin renders */}}
 			<div class="ui compact icon buttons file-view-toggle-buttons {{Iif .HasSourceRenderedToggle "" "tw-hidden"}}">
diff --git a/web_src/css/repo.css b/web_src/css/repo.css
index 16fbfaec4a..52af7c03a4 100644
--- a/web_src/css/repo.css
+++ b/web_src/css/repo.css
@@ -169,6 +169,9 @@ td .commit-summary {
   padding: 8px;
   vertical-align: middle;
   color: var(--color-text);
+  background: none;
+  border: none;
+  cursor: pointer;
 }
 
 .non-diff-file-content .header .file-actions .btn-octicon:hover {