diff --git a/mod/workshop/assessments.php b/mod/workshop/assessments.php
index da594e0..b016808 100644
--- a/mod/workshop/assessments.php
+++ b/mod/workshop/assessments.php
@@ -28,7 +28,6 @@
 
     require("../../config.php");
     require("lib.php");
-    require("locallib.php");
 
     $action         = required_param('action', PARAM_ALPHA);
     $id             = optional_param('id', 0, PARAM_INT);    // Course Module ID
@@ -63,6 +62,7 @@
     }
 
     require_login($course->id, false, $cm);
+    require('locallib.php'); // MDL-21494 must be called after require_login()
     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
 
     $strworkshops = get_string("modulenameplural", "workshop");