diff --git a/notebook/templates/tree.html b/notebook/templates/tree.html
index 3b5169675..48ff92cbf 100644
--- a/notebook/templates/tree.html
+++ b/notebook/templates/tree.html
@@ -65,7 +65,7 @@ data-server-root="{{server_root}}"
                   <button class="dropdown-toggle btn btn-default btn-xs" id="new-dropdown-button" data-toggle="dropdown">
                   <span>{% trans %}New{% endtrans %}</span>
                   <span class="caret"></span>
-                  <span class="sr-only">Toggle Dropdown</span>
+                  <span class="sr-only">{% trans %}Toggle Dropdown{% endtrans %}</span>
                   </button>
                   <ul id="new-menu" class="dropdown-menu">
                     <li role="presentation" class="dropdown-header" id="notebook-kernels">Notebook:</li>