diff --git a/json.js b/json.js
index 15ebda6..ea2377f 100755
--- a/json.js
+++ b/json.js
@@ -1,6 +1,6 @@
 /*
     json.js
-    2010-11-18
+    2010-12-08
 
     Public Domain
 
@@ -193,6 +193,13 @@
 */
 
 
+// Create a JSON object only if one does not already exist. We create the
+// methods in a closure to avoid creating global variables.
+
+if (!this.JSON) {
+    this.JSON = {};
+}
+
 (function () {
     "use strict";