diff --git a/react-packager/src/DependencyResolver/DependencyGraph/index.js b/react-packager/src/DependencyResolver/DependencyGraph/index.js
index cbd7e192..21208e1b 100644
--- a/react-packager/src/DependencyResolver/DependencyGraph/index.js
+++ b/react-packager/src/DependencyResolver/DependencyGraph/index.js
@@ -45,9 +45,9 @@ class DependencyGraph {
       ignoreFilePath: ignoreFilePath || (() => {}),
       fileWatcher,
       assetRoots_DEPRECATED: assetRoots_DEPRECATED || [],
-      assetExts,
+      assetExts: assetExts || [],
       providesModuleNodeModules,
-      platforms,
+      platforms: platforms || [],
       cache,
     };
     this._cache = this._opts.cache;