diff --git a/react-packager/src/Bundler/index.js b/react-packager/src/Bundler/index.js
index b8bfb6ba..a6041e40 100644
--- a/react-packager/src/Bundler/index.js
+++ b/react-packager/src/Bundler/index.js
@@ -390,10 +390,11 @@ class Bundler {
         const numModuleSystemDependencies =
           this._resolver.getModuleSystemDependencies({dev, unbundle}).length;
 
-        entryFilePath = response.dependencies[
-          (response.numPrependedDependencies || 0) +
-          numModuleSystemDependencies
-        ].path;
+
+        const dependencyIndex = (response.numPrependedDependencies || 0) + numModuleSystemDependencies;
+        if (dependencyIndex in response.dependencies) {
+          entryFilePath = response.dependencies[dependencyIndex].path;
+        }
       }
 
       const toModuleTransport = module =>
diff --git a/react-packager/src/Resolver/polyfills/require.js b/react-packager/src/Resolver/polyfills/require.js
index 05fa02dc..28a3c2ae 100644
--- a/react-packager/src/Resolver/polyfills/require.js
+++ b/react-packager/src/Resolver/polyfills/require.js
@@ -139,7 +139,7 @@ if (__DEV__) { // HMR
   }
 
   function acceptAll(modules, inverseDependencies) {
-    if (modules.length === 0) {
+    if (!modules || modules.length === 0) {
       return true;
     }