diff --git a/examples/timeline/25_background_areas.html b/examples/timeline/25_background_areas.html
index ef06131e..c6505fae 100644
--- a/examples/timeline/25_background_areas.html
+++ b/examples/timeline/25_background_areas.html
@@ -12,9 +12,6 @@
     .vis-item.vis-background.negative {
       background-color: rgba(255, 0, 0, 0.2);
     }
-    .vis-item.vis-background.marker {
-      border-left: 2px solid green;
-    }
   </style>
 
   <script src="../../dist/vis.js"></script>
diff --git a/lib/timeline/component/css/item.css b/lib/timeline/component/css/item.css
index 756c55b0..7d33e68a 100644
--- a/lib/timeline/component/css/item.css
+++ b/lib/timeline/component/css/item.css
@@ -49,7 +49,7 @@
   box-sizing: border-box;
 }
 
-.vis-item.background {
+.vis-item.vis-background {
   border: none;
   background-color: rgba(213, 221, 246, 0.4);
   box-sizing: border-box;
@@ -71,7 +71,7 @@
   display: inline-block;
 }
 
-.vis-item.background .vis-item-content {
+.vis-item.vis-background .vis-item-content {
   position: absolute;
   display: inline-block;
 }