@Version causes integer fields to return a string

/**
 * @Entity
 */
class SimpleTest {
	 /**
     * @Id
     * @generatedValue(strategy="AUTO")
     * @Column(type="integer")
     */
    private $id;
    /**
     * @Column(type="integer")
     * @version
     */
    private $version;
    /**
     * @Column
     */
    private $content;
    
    public function setContent ($content) {
    	$this->content = $content;
    }
    
    public function getVersion () {
    	return $this->version;
    }
    
    public function getId () {
    	return $this->id;
    }
    
}

$test = new SimpleTest();
$test->setContent("V1");
$em->persist($test);
$em->flush();

if (gettype($test->getVersion()) == "string") { die("Version should be an integer, not a string!"); }