gistfile1.aw

diff --git a/services.runtime.inc b/services.runtime.inc
index ec6f801..ccf90c5 100644
--- a/services.runtime.inc
+++ b/services.runtime.inc
@@ -139,6 +139,12 @@ function services_controller_execute($controller, $args = array(), $options = ar
     $access_arguments = $args;
   }
 
+  // Load the proper file for the access callback
+  if (!empty($controller['access callback file']) && $access_cb_file = $controller['access callback file']) {
+    $access_cb_file_name = isset($access_cb_file['name']) ? $access_cb_file['name'] : NULL;
+    module_load_include($access_cb_file['type'], $access_cb_file['module'], $access_cb_file_name);
+  }
+
   // Call default or custom access callback
   if (call_user_func_array($controller['access callback'], $access_arguments) != TRUE) {
     global $user;
diff --git a/services.services.api.php b/services.services.api.php
index 031f7a4..a1393fb 100644
--- a/services.services.api.php
+++ b/services.services.api.php
@@ -41,9 +41,16 @@
   *   - help: Text describing what this callback does.
   *   - callback: The name of a function to call when this resource is
   *     requested.
+  *   - file: an array describing the file which contains the callback
+  *     function
   *   - access callback: The name of a function to call to check whether
   *     the requesting user has permission to access this resource. If not
   *     specified, this defaults to 'user_access'.
+  *   - access callback file: an array describing the file which contains the
+  *     access callback function.  This attribute only needs to be supplied if
+  *     the method callback and the access callback are defined in different
+  *     files, for example when a method callback is overridden using
+  *     hook_services_resources_alter but the access callback is not
   *   - access arguments: The arguments to pass to the access callback.
   *   - access arguments append: A boolean indicating whether the resource's
   *     arguments should be appended to the access arguments. This can be useful
@@ -79,6 +86,7 @@ $node_resource = array(
           ),
         ),
         'access callback' => '_node_resource_access',
+        'access callback file' => array('type' => 'inc', 'module' => 'services', 'name' => 'resources/node_resource'),
         'access arguments' => array('view'),
         'access arguments append' => TRUE,
       ),