diff --git a/src/JWT.php b/src/JWT.php
index 6d30e941..d4852a6d 100644
--- a/src/JWT.php
+++ b/src/JWT.php
@@ -64,16 +64,13 @@ class JWT
      * @uses jsonDecode
      * @uses urlsafeB64Decode
      */
-    public static function decode($jwt, $key, $allowed_algs = array())
+    public static function decode($jwt, $key, array $allowed_algs = array())
     {
         $timestamp = is_null(static::$timestamp) ? time() : static::$timestamp;
 
         if (empty($key)) {
             throw new InvalidArgumentException('Key may not be empty');
         }
-        if (!is_array($allowed_algs)) {
-            throw new InvalidArgumentException('Algorithm not allowed');
-        }
         $tks = explode('.', $jwt);
         if (count($tks) != 3) {
             throw new UnexpectedValueException('Wrong number of segments');