diff --git a/include/socgraph.php b/include/socgraph.php
index 177ed0f3a..b34d5142c 100644
--- a/include/socgraph.php
+++ b/include/socgraph.php
@@ -1,5 +1,6 @@
 <?php /** @file */
 
+require_once('include/dir_fns.php');
 require_once('include/zot.php');
 
 /*