diff --git a/multifield.install b/multifield.install
index e35248b..e698fb9 100644
--- a/multifield.install
+++ b/multifield.install
@@ -43,6 +43,12 @@ function multifield_schema() {
       'primary key' => 'mfid',
       'identifier' => 'multifield',
       'default hook' => 'multifield_default_multifield',
+      'api' => array(
+        'owner' => 'multifield',
+        'api' => 'multifield',
+        'minimum_version' => 1,
+        'current_version' => 1,
+      ),
       'cache defaults' => TRUE,
       'load callback' => 'multifield_load',
       'load all callback' => 'multifield_load_all',
diff --git a/multifield.module b/multifield.module
index 13a1d41..f88b928 100644
--- a/multifield.module
+++ b/multifield.module
@@ -1,6 +1,7 @@
 <?php
 
 require_once dirname(__FILE__) . '/multifield.field.inc';
+require_once dirname(__FILE__) . '/multifield.features.inc';
 
 /**
  * Implements hook_permission().