diff --git a/core/ui/MoreSideBar/Tags.tid b/core/ui/MoreSideBar/Tags.tid
index 1ba364617..b3499b527 100644
--- a/core/ui/MoreSideBar/Tags.tid
+++ b/core/ui/MoreSideBar/Tags.tid
@@ -22,6 +22,6 @@ caption: {{$:/language/SideBar/Tags/Caption}}
 
 </$list>
 
-<br/>
+<hr class="tc-untagged-separator">
 
 {{$:/core/ui/UntaggedTemplate}} <small class="tc-menu-list-count"><$count filter="[untagged[]!is[system]] -[tags[]]"/></small>
diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index 596565bdf..d9ffa81a8 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -330,6 +330,15 @@ button.tc-tag-label, span.tc-tag-label {
 	border-radius: 8px;
 }
 
+.tc-untagged-separator {
+	width: 10em;
+	left: 0;
+	margin-left: 0;
+	border: 0;
+	height: 1px;
+	background: <<colour tab-divider>>;
+}
+
 .tc-untagged-label {
 	background-color: <<colour untagged-background>>;
 }