diff --git a/react-packager/src/node-haste/DependencyGraph/HasteMap.js b/react-packager/src/node-haste/DependencyGraph/HasteMap.js
index 7efbeb42..172e0493 100644
--- a/react-packager/src/node-haste/DependencyGraph/HasteMap.js
+++ b/react-packager/src/node-haste/DependencyGraph/HasteMap.js
@@ -12,6 +12,7 @@ const EventEmitter = require('events');
 
 const path = require('../fastpath');
 const getPlatformExtension = require('../lib/getPlatformExtension');
+const throat = require('throat');
 
 const GENERIC_PLATFORM = 'generic';
 const NATIVE_PLATFORM = 'native';
@@ -33,6 +34,9 @@ class HasteMap extends EventEmitter {
     this._preferNativePlatform = preferNativePlatform;
     this._helpers = helpers;
     this._platforms = platforms;
+
+    this._processHastePackage = throat(1, this._processHastePackage.bind(this));
+    this._processHasteModule = throat(1, this._processHasteModule.bind(this));
   }
 
   build() {