diff --git a/src/sao.less b/src/sao.less
index 965435f03f..9f804260a1 100644
--- a/src/sao.less
+++ b/src/sao.less
@@ -190,6 +190,7 @@ img.icon {
 
 .treeview {
     -moz-user-select: none;
+    -webkit-user-select: none;
     overflow-x: auto;
 
     > table.tree {