diff --git a/IPython/html/static/tree/less/tree.less b/IPython/html/static/tree/less/tree.less
index 835f036..8ae733a 100644
--- a/IPython/html/static/tree/less/tree.less
+++ b/IPython/html/static/tree/less/tree.less
@@ -158,6 +158,7 @@ input.engine_num_input {
 
 #notebook_toolbar .pull-right {
     padding-top: 0px;
+    margin-right: -1px;
 }
 
 ul#new-menu {