diff --git a/htdocs/societe/class/api_contacts.class.php b/htdocs/societe/class/api_contacts.class.php
index 5f52c2b775c..04bd8d1b054 100644
--- a/htdocs/societe/class/api_contacts.class.php
+++ b/htdocs/societe/class/api_contacts.class.php
@@ -336,7 +336,8 @@ class Contacts extends DolibarrApi
      * @url GET {id}/categories
      */
     function getCategories($id, $sortfield = "s.rowid", $sortorder = 'ASC', $limit = 0, $page = 0) {
-        $categories = new Categories();
+    	require_once DOL_DOCUMENT_ROOT.'/categories/class/api_categories.class.php';
+    	$categories = new Categories();	// TODO Use Categories object not API object
         return $categories->getListForItem($sortfield, $sortorder, $limit, $page, 'contact', $id);
     }
 
diff --git a/htdocs/societe/class/api_thirdparties.class.php b/htdocs/societe/class/api_thirdparties.class.php
index 2b71e59badf..6d6d9efb3cf 100644
--- a/htdocs/societe/class/api_thirdparties.class.php
+++ b/htdocs/societe/class/api_thirdparties.class.php
@@ -271,7 +271,8 @@ class Thirdparties extends DolibarrApi
      * @url GET {id}/categories
      */
     function getCategories($id, $sortfield = "s.rowid", $sortorder = 'ASC', $limit = 0, $page = 0) {
-        $categories = new Categories();
+    	require_once DOL_DOCUMENT_ROOT.'/categories/class/api_categories.class.php';
+    	$categories = new Categories();	// TODO Use Categories object not API object
         return $categories->getListForItem($sortfield, $sortorder, $limit, $page, 'customer', $id);
     }