diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3c3629e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules
diff --git a/src/md2.js b/src/md2.js
index e05ba03..3a69451 100644
--- a/src/md2.js
+++ b/src/md2.js
@@ -13,7 +13,8 @@
 (function (root, undefined) {
 	'use strict';
 
-	var NODE_JS = typeof(module) != 'undefined';
+
+	var NODE_JS = typeof window === 'undefined';
 	if (NODE_JS) {
 		root = global;
 	}