diff --git a/lib/NodeJsInputFileSystem.js b/lib/NodeJsInputFileSystem.js
index 077488b0..3dd01b0f 100644
--- a/lib/NodeJsInputFileSystem.js
+++ b/lib/NodeJsInputFileSystem.js
@@ -12,6 +12,12 @@ NodeJsInputFileSystem.prototype.isSync = function() {
 };
 
 NodeJsInputFileSystem.prototype.stat = fs.stat.bind(fs);
-NodeJsInputFileSystem.prototype.readdir = fs.readdir.bind(fs);
+NodeJsInputFileSystem.prototype.readdir = function readdir(path, callback) {
+	fs.readdir(path, function (err, files) {
+		callback(err, files && files.map(function (file) {
+			return file.normalize ? file.normalize("NFC") : file;
+		}));
+	});
+};
 NodeJsInputFileSystem.prototype.readFile = fs.readFile.bind(fs);
 NodeJsInputFileSystem.prototype.readlink = fs.readlink.bind(fs);
\ No newline at end of file
diff --git a/lib/SyncNodeJsInputFileSystem.js b/lib/SyncNodeJsInputFileSystem.js
index 78eee20b..a74fffeb 100644
--- a/lib/SyncNodeJsInputFileSystem.js
+++ b/lib/SyncNodeJsInputFileSystem.js
@@ -24,6 +24,11 @@ function asAsync(fn, context) {
 }
 
 SyncNodeJsInputFileSystem.prototype.stat = asAsync(fs.statSync, fs);
-SyncNodeJsInputFileSystem.prototype.readdir = asAsync(fs.readdirSync, fs);
+SyncNodeJsInputFileSystem.prototype.readdir = asAsync(function readdirSync(path) {
+	var files = fs.readdirSync(path);
+	return files && files.map(function (file) {
+		return file.normalize ? file.normalize("NFC") : file;
+	});
+}, fs);
 SyncNodeJsInputFileSystem.prototype.readFile = asAsync(fs.readFileSync, fs);
 SyncNodeJsInputFileSystem.prototype.readlink = asAsync(fs.readlinkSync, fs);
\ No newline at end of file