diff --git a/packager/react-packager/src/Server/index.js b/packager/react-packager/src/Server/index.js
index da8ba0054..2b33f20b3 100644
--- a/packager/react-packager/src/Server/index.js
+++ b/packager/react-packager/src/Server/index.js
@@ -92,7 +92,7 @@ const bundleOpts = declareOpts({
   },
   platform: {
     type: 'string',
-    required: false,
+    required: true,
   }
 });