diff --git a/course/enrol.php b/course/enrol.php
index 0ebb95e..551d35d 100644
--- a/course/enrol.php
+++ b/course/enrol.php
@@ -11,6 +11,8 @@
     $loginasguest = optional_param('loginasguest', 0, PARAM_BOOL); // hmm, is this still needed?
 
     if (!isloggedin()) {
+        // Force login and ignore Auto-login guest to enrol a user into this course. Refs: MDL-7903.
+        require_login($id, false);
         $wwwroot = $CFG->wwwroot;
         if (!empty($CFG->loginhttps)) {
             $wwwroot = str_replace('http:','https:', $wwwroot);