diff --git a/cake/libs/validation.php b/cake/libs/validation.php
index db9d003c3..339d8668d 100644
--- a/cake/libs/validation.php
+++ b/cake/libs/validation.php
@@ -632,7 +632,7 @@ class Validation extends Object {
 	function multiple($check, $options = array()) {
 		$defaults = array('in' => null, 'max' => null, 'min' => null);
 		$options = array_merge($defaults, $options);
-		$check = array_filter($check);
+		$check = array_filter((array)$check);
 		if (empty($check)) {
 			return false;
 		}
diff --git a/cake/tests/cases/libs/validation.test.php b/cake/tests/cases/libs/validation.test.php
index 0c9495d63..3f2c35c13 100644
--- a/cake/tests/cases/libs/validation.test.php
+++ b/cake/tests/cases/libs/validation.test.php
@@ -1782,6 +1782,8 @@ class ValidationTestCase extends CakeTestCase {
 		$this->assertTrue(Validation::multiple(array(0, 1, 2, 3)));
 		$this->assertTrue(Validation::multiple(array(50, 32, 22, 0)));
 		$this->assertTrue(Validation::multiple(array('str', 'var', 'enum', 0)));
+		$this->assertFalse(Validation::multiple(''));
+		$this->assertFalse(Validation::multiple(null));
 		$this->assertFalse(Validation::multiple(array()));
 		$this->assertFalse(Validation::multiple(array(0)));
 		$this->assertFalse(Validation::multiple(array('0')));