diff --git a/ajax/categories/delete.php b/ajax/categories/delete.php
index 68a308e3..f53d852d 100644
--- a/ajax/categories/delete.php
+++ b/ajax/categories/delete.php
@@ -11,7 +11,7 @@ OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAppEnabled('contacts');
 OCP\JSON::callCheck();
 
-require_once('../loghandler.php');
+require_once(__DIR__.'/../loghandler.php');
 
 $categories = isset($_POST['categories'])?$_POST['categories']:null;