diff --git a/src/range.js b/src/range.js
index 0d750f2..f29ecde 100644
--- a/src/range.js
+++ b/src/range.js
@@ -1,27 +1,34 @@
-var ObjectRange = Class.create(Enumerable, {
-  initialize: function(start, end, exclusive) {
+function $R(start, end, exclusive) {
+  return new ObjectRange(start, end, exclusive);
+}
+
+var ObjectRange = Class.create(Enumerable, (function() {
+  function initialize(start, end, exclusive) {
     this.start = start;
     this.end = end;
     this.exclusive = exclusive;
-  },
+  }
   
-  _each: function(iterator) {
+  function _each(iterator) {
     var value = this.start;
     while (this.include(value)) {
       iterator(value);
       value = value.succ();
     }
-  },
+  }
   
-  include: function(value) {
+  function include(value) {
     if (value < this.start) 
       return false;
     if (this.exclusive)
       return value < this.end;
     return value <= this.end;
   }
-});
+  
+  return {
+    initialize: initialize,
+    _each:      _each,
+    include:    include
+  };
+})());
 
-var $R = function(start, end, exclusive) {
-  return new ObjectRange(start, end, exclusive);
-};