diff --git a/doc/users.md b/doc/users.md
index b6c36309d70..3bc20c39bc3 100644
--- a/doc/users.md
+++ b/doc/users.md
@@ -36,6 +36,13 @@ $user = $client->api('user')->show('KnpLabs');
 
 Returns an array of information about the user.
 
+
+You can also use the User ID, but it will use an undocumented Github API
+
+```php
+$user = $client->api('user')->showById(202732);
+```
+
 ### Update user information
 
 > Requires [authentication](security.md).
diff --git a/lib/Github/Api/User.php b/lib/Github/Api/User.php
index c4414c56c75..6cfcd238143 100644
--- a/lib/Github/Api/User.php
+++ b/lib/Github/Api/User.php
@@ -59,6 +59,21 @@ public function show($username)
         return $this->get('/users/'.rawurlencode($username));
     }
 
+    /**
+     * Get extended information about a user by its id.
+     * Note: at time of writing this is an undocumented feature but GitHub support have advised that it can be relied on.
+     *
+     * @link http://developer.github.com/v3/users/
+     *
+     * @param int $id the id of the user to show
+     *
+     * @return array information about the user
+     */
+    public function showById($id)
+    {
+        return $this->get('/user/'.$id);
+    }
+
     /**
      * Get extended information about a user by its username.
      *
diff --git a/test/Github/Tests/Api/UserTest.php b/test/Github/Tests/Api/UserTest.php
index 0c9eea62b9d..795c48fa992 100644
--- a/test/Github/Tests/Api/UserTest.php
+++ b/test/Github/Tests/Api/UserTest.php
@@ -20,6 +20,22 @@ public function shouldShowUser()
         $this->assertEquals($expectedArray, $api->show('l3l0'));
     }
 
+    /**
+     * @test
+     */
+    public function shouldShowByIdUser()
+    {
+        $expectedArray = ['id' => 1, 'username' => 'l3l0'];
+
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('get')
+            ->with('/user/1')
+            ->will($this->returnValue($expectedArray));
+
+        $this->assertEquals($expectedArray, $api->showById(1));
+    }
+
     /**
      * @test
      */