diff --git a/lib/less/tree/ruleset.js b/lib/less/tree/ruleset.js
index dc8a530b..e318140c 100644
--- a/lib/less/tree/ruleset.js
+++ b/lib/less/tree/ruleset.js
@@ -19,8 +19,6 @@ var Ruleset = function (selectors, rules, strictImports, visibilityInfo) {
     this.setParent(this.selectors, this);
     this.setParent(this.rules, this);
 
-    this.types = Object.create(null);
-
 };
 Ruleset.prototype = new Node();
 Ruleset.prototype.type = "Ruleset";
diff --git a/package.json b/package.json
index 24d429e2..118980b5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "less",
-  "version": "3.0.0-pre.1",
+  "version": "3.0.0-pre.2",
   "description": "Leaner CSS",
   "homepage": "http://lesscss.org",
   "author": {