diff --git a/packager/src/node-haste/DependencyGraph/ResolutionRequest.js b/packager/src/node-haste/DependencyGraph/ResolutionRequest.js
index f8b690e637d29c..aec46b751419b4 100644
--- a/packager/src/node-haste/DependencyGraph/ResolutionRequest.js
+++ b/packager/src/node-haste/DependencyGraph/ResolutionRequest.js
@@ -278,7 +278,7 @@ class ResolutionRequest {
 
   _resolveFileOrDir(fromModule, toModuleName) {
     const potentialModulePath = isAbsolutePath(toModuleName) ?
-        toModuleName :
+        resolveWindowsPath(toModuleName) :
         path.join(path.dirname(fromModule.path), toModuleName);
 
     return this._redirectRequire(fromModule, potentialModulePath).then(
@@ -509,6 +509,16 @@ function normalizePath(modulePath) {
   return modulePath.replace(/\/$/, '');
 }
 
+// HasteFS stores paths with backslashes on Windows, this ensures the path is
+// in the proper format. Will also add drive letter if not present so `/root` will
+// resolve to `C:\root`. Noop on other platforms.
+function resolveWindowsPath(modulePath) {
+  if (path.sep !== '\\') {
+    return modulePath;
+  }
+  return path.resolve(modulePath);
+}
+
 function resolveKeyWithPromise([key, promise]) {
   return promise.then(value => [key, value]);
 }
diff --git a/packager/src/node-haste/__tests__/DependencyGraph-test.js b/packager/src/node-haste/__tests__/DependencyGraph-test.js
index a1318d828ff6f2..d1bfdbcbabc261 100644
--- a/packager/src/node-haste/__tests__/DependencyGraph-test.js
+++ b/packager/src/node-haste/__tests__/DependencyGraph-test.js
@@ -2533,7 +2533,7 @@ describe('DependencyGraph', function() {
       const root = 'C:\\root';
       setMockFileSystem({
         'root': {
-          'index.js': 'require("C:\\\\root\\\\apple.js");',
+          'index.js': 'require("C:/root/apple.js");',
           'apple.js': '',
         },
       });
@@ -2548,7 +2548,7 @@ describe('DependencyGraph', function() {
             {
               id: 'C:\\root\\index.js',
               path: 'C:\\root\\index.js',
-              dependencies: ['C:\\root\\apple.js'],
+              dependencies: ['C:/root/apple.js'],
               isAsset: false,
               isJSON: false,
               isPolyfill: false,