diff --git a/mod/chat/locallib.php b/mod/chat/locallib.php
index 45de13b8cae..01cf1ac89dc 100644
--- a/mod/chat/locallib.php
+++ b/mod/chat/locallib.php
@@ -19,6 +19,7 @@
  * Library of functions for chat outside of the core api
  */
 
+require_once($CFG->dirroot . '/mod/chat/lib.php');
 require_once($CFG->libdir . '/portfolio/caller.php');
 
 /**
@@ -117,7 +118,7 @@ class chat_portfolio_caller extends portfolio_module_caller_base {
         $sessiongap = 5 * 60;    // 5 minutes silence means a new session
         foreach ($this->messages as $message) {  // We are walking FORWARDS through messages
             $m = clone $message; // grrrrrr - this causes the sha1 to change as chat_format_message changes what it's passed.
-            $formatmessage = chat_format_message($m, $this->course->id, $this->user);
+            $formatmessage = chat_format_message($m, $this->cm->course, $this->user);
             if (!isset($formatmessage->html)) {
                 continue;
             }