diff --git a/packages/node_modules/@node-red/editor-client/src/js/red.js b/packages/node_modules/@node-red/editor-client/src/js/red.js
index 55446418b..7544434b7 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/red.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/red.js
@@ -766,7 +766,7 @@ var RED = (function() {
         $('<div id="red-ui-header-shade" class="hide"></div>').appendTo(header);
         $('<div id="red-ui-main-container" class="red-ui-sidebar-closed hide">'+
             '<div id="red-ui-workspace"></div>'+
-            '<div id="red-ui-editor-stack"></div>'+
+            '<div id="red-ui-editor-stack" tabindex="-1"></div>'+
             '<div id="red-ui-palette"></div>'+
             '<div id="red-ui-sidebar"></div>'+
             '<div id="red-ui-sidebar-separator"></div>'+