diff --git a/node_modules/jquery/src/var/isWindow.js b/node_modules/jquery/src/var/isWindow.js
new file mode 100644
index 0000000..2ba1168
--- /dev/null
+++ b/node_modules/jquery/src/var/isWindow.js
@@ -0,0 +1,8 @@
+define( function() {
+	"use strict";
+
+	return function isWindow( obj ) {
+		return obj != null && obj === obj.window;
+	};
+
+} );