diff --git a/lodash.js b/lodash.js
index eb7781b8a..67f451c5a 100644
--- a/lodash.js
+++ b/lodash.js
@@ -1180,6 +1180,8 @@
    * // => true
    */
   var isArray = nativeIsArray || function(value) {
+    // `instanceof` may cause a memory leak in IE 7 if `value` is a host object
+    // http://ajaxian.com/archives/working-aroung-the-instanceof-memory-leak
     return value instanceof Array || toString.call(value) == arrayClass;
   };