diff --git a/source/Ox.js b/source/Ox.js
index 242bb59c..a2ff9e37 100644
--- a/source/Ox.js
+++ b/source/Ox.js
@@ -289,15 +289,21 @@ Ox.avg = function(obj) {
 };
 
 /*@
-Ox.clone <f> Returns a (shallow) copy of an object or array
+Ox.clone <f> Returns a (deep) copy of an object or array
     > (function() { a = ['val']; b = Ox.clone(a); a[0] = null; return b[0]; }())
     'val'
     > (function() { a = {key: 'val'}; b = Ox.clone(a); a.key = null; return b.key; }())
     'val'
 @*/
 
-Ox.clone = function(obj) {
-    return Ox.isArray(obj) ? obj.slice() : Ox.extend({}, obj);
+Ox.clone = function(col) {
+    // return Ox.isArray(col) ? col.slice() : Ox.extend({}, col);
+    var clone = Ox.isArray(col) ? [] : {};
+    Ox.forEach(col, function(val, key) {
+        clone[key] = ['array', 'object'].indexOf(Ox.typeOf(val)) > -1
+            ? Ox.clone(val) : val;
+    });
+    return clone;
 };
 
 /*@