diff --git a/src/Umbraco.Web.UI.Client/src/less/tree.less b/src/Umbraco.Web.UI.Client/src/less/tree.less
index dcbae04995..d809418f2c 100644
--- a/src/Umbraco.Web.UI.Client/src/less/tree.less
+++ b/src/Umbraco.Web.UI.Client/src/less/tree.less
@@ -210,7 +210,7 @@
 
 .umb-tree .umb-tree-node-checked i[class^="icon-"],
 .umb-tree .umb-tree-node-checked i[class*=" icon-"] {
-    font-family: icomoon !important;
+    font-family: 'icomoon' !important;
     color:@blue !important;
 }
 .umb-tree .umb-tree-node-checked i:before {