diff --git a/mod/quiz/report/default.php b/mod/quiz/report/default.php
index d27ee925770..0a2f96a2880 100644
--- a/mod/quiz/report/default.php
+++ b/mod/quiz/report/default.php
@@ -34,7 +34,7 @@ class quiz_default_report {
     /// Print the tabs    
         $currenttab = 'reports';
         $mode = $reportmode;
-        include('tabs.php');
+        require($CFG->dirroot . '/mod/quiz/tabs.php');
     }
 }