diff --git a/mod/assignment/details.php b/mod/assignment/details.php
index 146f1c295d4..54b7f7385f1 100644
--- a/mod/assignment/details.php
+++ b/mod/assignment/details.php
@@ -5,7 +5,7 @@
 	require_once("../../config.php");
 	require_once("lib.php");
 
-	if (!$form = data_submitted()) {
+	if (!$form = data_submitted($CFG->wwwroot.'/course/mod.php')) {
         error("This script was called wrongly");
     }