diff --git a/course/modedit.php b/course/modedit.php
index 914b0b2f176..9ab4375ddd4 100644
--- a/course/modedit.php
+++ b/course/modedit.php
@@ -2,8 +2,8 @@
 
 //  adds or updates modules in a course using new formslib
 
-    require("../config.php");
-    require("lib.php");
+    require_once("../config.php");
+    require_once("lib.php");
 
     require_login();
 
@@ -280,4 +280,4 @@
         $mform->display();
         print_footer($course);
     }
-?>
\ No newline at end of file
+?>