diff --git a/auth/mnet/auth.php b/auth/mnet/auth.php
index b7f98118ecb..87360ed5764 100644
--- a/auth/mnet/auth.php
+++ b/auth/mnet/auth.php
@@ -1124,7 +1124,7 @@ class auth_plugin_mnet extends auth_plugin_base {
             $mnet_request->add_param($username);
             $mnet_request->add_param($useragent);
             if ($mnet_request->send($mnet_peer) === false) {
-                debugging("Server side error has occured on host $mnethostid: " .
+                debugging("Server side error has occured on host $mnetsession->mnethostid: " .
                           join("\n", $mnet_request->error));
             }
         }