diff --git a/ratelimitfile.php b/ratelimitfile.php
index 083cbf5..875e08b 100644
--- a/ratelimitfile.php
+++ b/ratelimitfile.php
@@ -4,6 +4,7 @@
     @author Dominique Fournier <dominique@fournier38.fr> */
 
 require_once ("domframework/lockfile.php");
+require_once ("domframework/ratelimit.php");
 
 /** The rate limit with file storage */
 class ratelimitfile extends ratelimit