diff --git a/lib/Cake/Test/Case/Utility/Set2Test.php b/lib/Cake/Test/Case/Utility/Set2Test.php
index 52816afa8ab..5e292d56d00 100644
--- a/lib/Cake/Test/Case/Utility/Set2Test.php
+++ b/lib/Cake/Test/Case/Utility/Set2Test.php
@@ -481,8 +481,8 @@ public function testNormalize() {
  */
 	public function testContains() {
 		$data = array('apple', 'bee', 'cyclops');
-		// $this->assertTrue(Set2::contains($data, array('apple')));
-		// $this->assertFalse(Set2::contains($data, array('data')));
+		$this->assertTrue(Set2::contains($data, array('apple')));
+		$this->assertFalse(Set2::contains($data, array('data')));
 
 		$a = array(
 			0 => array('name' => 'main'),
@@ -498,6 +498,18 @@ public function testContains() {
 		$this->assertTrue(Set2::contains($a, $a));
 		$this->assertFalse(Set2::contains($a, $b));
 		$this->assertTrue(Set2::contains($b, $a));
+
+		$a = array(
+			array('User' => array('id' => 1)),
+			array('User' => array('id' => 2)),
+		);
+		$b = array(
+			array('User' => array('id' => 1)),
+			array('User' => array('id' => 2)),
+			array('User' => array('id' => 3))
+		);
+		$this->assertTrue(Set2::contains($b, $a));
+		$this->assertFalse(Set2::contains($a, $b));
 	}
 
 }
diff --git a/lib/Cake/Utility/Set2.php b/lib/Cake/Utility/Set2.php
index cbf2d06d220..c8ff756d5c7 100644
--- a/lib/Cake/Utility/Set2.php
+++ b/lib/Cake/Utility/Set2.php
@@ -82,15 +82,28 @@ public static function contains(array $data, array $needle) {
 		if (empty($data) || empty($needle)) {
 			return false;
 		}
+		$stack = array();
+
+		$i = 1;
+		while (!empty($needle)) {
+			$key = key($needle);
+			$val = $needle[$key];
+			unset($needle[$key]);
 
-		foreach ($needle as $key => $val) {
 			if (isset($data[$key]) && is_array($val)) {
-				if (!Set2::contains($data[$key], $val)) {
-					return false;
+				$next = $data[$key];
+				unset($data[$key]);
+
+				if (!empty($val)) {
+					$stack[] = array($val, $next);
 				}
 			} elseif (!isset($data[$key]) || $data[$key] != $val) {
 				return false;
 			}
+
+			if (empty($needle) && !empty($stack)) {
+				list($needle, $data) = array_pop($stack);
+			}
 		}
 		return true;
 	}