diff --git a/lodash.js b/lodash.js
index a19f9c408..91ae02efa 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2476,10 +2476,9 @@
      * @param {boolean} [isDeep] Specify a deep flatten.
      * @param {boolean} [isStrict] Restrict flattening to arrays-like objects.
      * @param {Array} [result=[]] The initial result value.
-     * @param {Object} [stack] Tracks traversed arrays.
      * @returns {Array} Returns the new flattened array.
      */
-    function baseFlatten(array, isDeep, isStrict, result, stack) {
+    function baseFlatten(array, isDeep, isStrict, result) {
       result || (result = []);
 
       var index = -1,
@@ -2490,18 +2489,9 @@
         if (isArrayLikeObject(value) &&
             (isStrict || isArray(value) || isArguments(value))) {
           if (isDeep) {
-            stack || (stack = new Stack);
-            if (stack.get(array)) {
-              return result;
-            }
-            stack.set(array, true);
-
             // Recursively flatten arrays (susceptible to call stack limits).
-            baseFlatten(value, isDeep, isStrict, result, stack);
-
-            stack['delete'](array);
-          }
-          else {
+            baseFlatten(value, isDeep, isStrict, result);
+          } else {
             arrayPush(result, value);
           }
         } else if (!isStrict) {
diff --git a/test/test.js b/test/test.js
index 84d04c379..bd166d750 100644
--- a/test/test.js
+++ b/test/test.js
@@ -5276,32 +5276,6 @@
 
   /*--------------------------------------------------------------------------*/
 
-  QUnit.module('lodash.flattenDeep');
-
-  (function() {
-    QUnit.test('should flatten arrays with circular references', function(assert) {
-      assert.expect(2);
-
-      var array = [1, 2];
-      array.push(array);
-
-      var expected = [1, 2, 1, 2];
-
-      try {
-        var actual = _.flattenDeep(array);
-      } catch (e) {}
-
-      assert.deepEqual(actual, expected);
-
-      array = [1, 2];
-      array = [array, [array]];
-
-      assert.deepEqual(_.flattenDeep(array), expected);
-    });
-  }());
-
-  /*--------------------------------------------------------------------------*/
-
   QUnit.module('flatten methods');
 
   (function() {