diff --git a/course/view.php b/course/view.php
index 84fdc670112..6b4050f9d05 100644
--- a/course/view.php
+++ b/course/view.php
@@ -23,6 +23,10 @@
         }
     }
 
+    if ($course->id == SITEID) {      // This course is not a real course.
+        redirect("$CFG->wwwroot/");
+    }
+
     require_login($course->id);
 
     require_once($CFG->dirroot.'/calendar/lib.php');    /// This is after login because it needs $USER
@@ -135,10 +139,6 @@
 
     $SESSION->fromdiscussion = "$CFG->wwwroot/course/view.php?id=$course->id";
 
-    if (! $course->category) {      // This course is not a real course.
-        redirect("$CFG->wwwroot/");
-    }
-
     $strcourse = get_string("course");
 
     $loggedinas = "<p class=\"logininfo\">".user_login_string($course, $USER)."</p>";