diff --git a/modules/authYubiKey/lib/Auth/Source/YubiKey.php b/modules/authYubiKey/lib/Auth/Source/YubiKey.php
index 0bd2e1df9cfdc94ffd6ed9f8e9a5e94cf14cedb3..38d5546a3b5dfefdc72eb9ad0cedfb4efb37fac1 100644
--- a/modules/authYubiKey/lib/Auth/Source/YubiKey.php
+++ b/modules/authYubiKey/lib/Auth/Source/YubiKey.php
@@ -186,7 +186,7 @@ class sspmod_authYubiKey_Auth_Source_YubiKey extends SimpleSAML_Auth_Source {
 		$attributes = array();
 
 		try {
-			$yubi = &new Auth_Yubico($this->yubi_id, $this->yubi_key);
+			$yubi = new Auth_Yubico($this->yubi_id, $this->yubi_key);
 			$auth = $yubi->verify($otp);
 			$uid = self::getYubiKeyPrefix($otp);
 			$attributes = array('uid' => array($uid));