diff --git a/src/Illuminate/Support/MessageBag.php b/src/Illuminate/Support/MessageBag.php
index ad422ebdb56a..575b8d1937b9 100755
--- a/src/Illuminate/Support/MessageBag.php
+++ b/src/Illuminate/Support/MessageBag.php
@@ -103,6 +103,10 @@ protected function isUnique($key, $message)
      */
     public function has($key = null)
     {
+        if (is_null($key)) {
+            return $this->any();
+        }
+
         $keys = is_array($key) ? $key : func_get_args();
 
         foreach ($keys as $key) {
diff --git a/tests/Support/SupportMessageBagTest.php b/tests/Support/SupportMessageBagTest.php
index 45611a2dfa96..7536c93b0ab6 100755
--- a/tests/Support/SupportMessageBagTest.php
+++ b/tests/Support/SupportMessageBagTest.php
@@ -72,6 +72,7 @@ public function testHasIndicatesExistence()
         $container->add('foo', 'bar');
         $this->assertTrue($container->has('foo'));
         $this->assertFalse($container->has('bar'));
+        $this->assertTrue($container->has());
     }
 
     public function testHasAnyIndicatesExistence()