diff --git a/lib/browser/api/app.js b/lib/browser/api/app.js
index 80837501ecb4..167327c40b29 100644
--- a/lib/browser/api/app.js
+++ b/lib/browser/api/app.js
@@ -28,15 +28,13 @@ Object.assign(app, {
       const castedArgs = args.map((arg) => {
         return typeof arg !== 'string' ? `${arg}` : arg
       })
-
-      return binding.appendSwitch(...castedArgs)
+      return bindings.appendSwitch(...castedArgs)
     },
     appendArgument (...args) {
-      const castedArgs = [...arguments].map((arg) => {
+      const castedArgs = args.map((arg) => {
         return typeof arg !== 'string' ? `${arg}` : arg
       })
-
-      return binding.appendArgument(...castedArgs)
+      return bindings.appendArgument(...castedArgs)
     }
   }
 })