diff --git a/lodash.js b/lodash.js
index f43a69ed6..e71c89709 100644
--- a/lodash.js
+++ b/lodash.js
@@ -24,7 +24,7 @@
       PARTIAL_RIGHT_FLAG = 64;
 
   /** Used as the property name for wrapper metadata */
-  var EXPANDO = '__lodash@' + VERSION + '__';
+  var EXPANDO = '__lodash_' + VERSION.replace(/[-.]/g, '_') + '__';
 
   /** Used as the TypeError message for "Functions" methods */
   var FUNC_ERROR_TEXT = 'Expected a function';
diff --git a/test/test.js b/test/test.js
index 5df4236ae..39cd5b801 100644
--- a/test/test.js
+++ b/test/test.js
@@ -187,7 +187,7 @@
   ));
 
   /** Used as the property name for wrapper metadata */
-  var EXPANDO = '__lodash@'  + _.VERSION + '__';
+  var EXPANDO = '__lodash_' + _.VERSION.replace(/[-.]/g, '_') + '__';
 
   /** Used to provide falsey values to methods */
   var falsey = [, '', 0, false, NaN, null, undefined];