diff --git a/rhino_modules/jsdoc/augment.js b/rhino_modules/jsdoc/augment.js
index 04f79e78..47a375c0 100644
--- a/rhino_modules/jsdoc/augment.js
+++ b/rhino_modules/jsdoc/augment.js
@@ -1,3 +1,4 @@
+var doop = require("jsdoc/util/doop").doop;
 
 (function() {
     var hasOwnProperty = Object.prototype.hasOwnProperty;
@@ -74,20 +75,6 @@
         return members;
     }
 
-    function doop(o) {
-        if (o instanceof Object && o.constructor != Function) {
-            var clone = o instanceof Array ? [] : {}, prop;
-            
-            for (prop in o){
-                if ( hasOwnProperty.call(o, prop) ) { 
-                    clone[prop] = (o[prop] instanceof Object)? doop(o[prop]) : o[prop]; 
-                }
-            }
-            return clone;
-        }
-        return o;
-    };
-
     var Sorter = function(dependencies) {
         this.dependencies = dependencies;
         this.visited = {};
diff --git a/rhino_modules/jsdoc/borrow.js b/rhino_modules/jsdoc/borrow.js
index 54965b2d..12054639 100644
--- a/rhino_modules/jsdoc/borrow.js
+++ b/rhino_modules/jsdoc/borrow.js
@@ -5,6 +5,8 @@
 	@license Apache License 2.0 - See file 'LICENSE.md' in this project.
  */
 
+var doop = require("jsdoc/util/doop").doop;
+
 // requires docs to have been indexed: docs.index must be defined here
 /**
     Take a copy of the docs for borrowed symbols and attach them to the
@@ -47,22 +49,3 @@ exports.resolveBorrows = function(docs) {
         }
     });
 }
-
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-/**
-    Deep clone a simple object.
-    @private
- */
-function doop(o) {
-    if (o instanceof Object && o.constructor != Function) {
-        var clone = o instanceof Array ? [] : {}, prop;
-        
-        for (prop in o){
-            if ( hasOwnProperty.call(o, prop) ) { 
-                clone[prop] = (o[prop] instanceof Object)? doop(o[prop]) : o[prop]; 
-            }
-        }
-        return clone;
-    }
-    return o;
-};
diff --git a/rhino_modules/jsdoc/src/parser.js b/rhino_modules/jsdoc/src/parser.js
index 18f4173d..3a05be7d 100644
--- a/rhino_modules/jsdoc/src/parser.js
+++ b/rhino_modules/jsdoc/src/parser.js
@@ -304,14 +304,17 @@ exports.Parser.prototype.addDocletRef = function(e) {
 }
 
 exports.Parser.prototype.resolveEnum = function(e) {
-    var parent = currentParser.resolvePropertyParent(e.code.node);
+    var doop = require("jsdoc/util/doop").doop,
+        parent = currentParser.resolvePropertyParent(e.code.node);
     if (parent && parent.doclet.isEnum) {
         if (!parent.doclet.properties) { parent.doclet.properties = []; }
         // members of an enum inherit the enum's type
         if (parent.doclet.type && !e.doclet.type) { e.doclet.type = parent.doclet.type; }
         delete e.doclet.undocumented;
         e.doclet.defaultvalue = e.doclet.meta.code.value;
-        parent.doclet.properties.push(e.doclet);
+        // add the doclet to the parent's properties
+        // use a copy of the doclet to avoid circular references
+        parent.doclet.properties.push( doop(e.doclet) );
     }
 }
 
diff --git a/rhino_modules/jsdoc/util/doop.js b/rhino_modules/jsdoc/util/doop.js
new file mode 100644
index 00000000..74ab75fe
--- /dev/null
+++ b/rhino_modules/jsdoc/util/doop.js
@@ -0,0 +1,20 @@
+/**
+    Deep clone a simple object.
+    @private
+ */
+var doop = exports.doop = function(o) {
+    var clone,
+        hasOwnProp = Object.prototype.hasOwnProperty,
+        prop;
+    if (o instanceof Object && o.constructor != Function) {
+        clone = o instanceof Array ? [] : {};
+        
+        for (prop in o){
+            if ( hasOwnProp.call(o, prop) ) { 
+                clone[prop] = (o[prop] instanceof Object)? doop(o[prop]) : o[prop]; 
+            }
+        }
+        return clone;
+    }
+    return o;
+};
diff --git a/test/specs/tags/enumtag.js b/test/specs/tags/enumtag.js
index 44af4543..a7c32a28 100644
--- a/test/specs/tags/enumtag.js
+++ b/test/specs/tags/enumtag.js
@@ -22,4 +22,10 @@ describe("@enum tag", function() {
     it('If a @type is given for the property it is reflected in the property value.', function() {
         expect(tristate.properties[2].type.names.join(', ')).toEqual('boolean');
     });
+    
+    it('An enum does not contain any circular references.', function() {
+        var dump = require("jsdoc/util/dumper").dump;
+        
+        expect( dump(tristate) ).not.toMatch("<CircularRef>");
+    });
 });
\ No newline at end of file