diff --git a/src/Umbraco.Web.UI.Client/src/less/tree.less b/src/Umbraco.Web.UI.Client/src/less/tree.less
index d809418f2c..1d1d0907ff 100644
--- a/src/Umbraco.Web.UI.Client/src/less/tree.less
+++ b/src/Umbraco.Web.UI.Client/src/less/tree.less
@@ -49,7 +49,7 @@
 .umb-tree li.current > div i.icon,
 .umb-tree li.current > div ins {
 	color: white !important;
-	background: @blue;
+	background-color: @blue;
 	border-color: @blue;
 }