diff --git a/lib/app/App.js b/lib/app/App.js
index 9d1c64068e..575d2cba00 100644
--- a/lib/app/App.js
+++ b/lib/app/App.js
@@ -88,8 +88,8 @@ export default {
     },
     loadLayout (layout) {
       const undef = !layout
-      const inexisting = !(layouts[`_${layout}`] || resolvedLayouts[`_` + layout])
-      let _layout = `_${(undef || inexisting) ? 'default' : layout}`
+      const inexisting = !(layouts['_' + layout] || resolvedLayouts['_' + layout])
+      let _layout = '_' + ((undef || inexisting) ? 'default' : layout)
       if (resolvedLayouts[_layout]) {
         return Promise.resolve(resolvedLayouts[_layout])
       }