diff --git a/enrol/renderer.php b/enrol/renderer.php
index 9f7d8fad35af7..2a2ee1f8caa1b 100644
--- a/enrol/renderer.php
+++ b/enrol/renderer.php
@@ -193,7 +193,7 @@ public function user_roles_and_actions($userid, $roles, $assignableroles, $canas
             if ($canassign and (is_siteadmin() or isset($assignableroles[$roleid])) and !$role['unchangeable']) {
                 $strunassign = get_string('unassignarole', 'role', $role['text']);
                 $icon = html_writer::empty_tag('img', array('alt'=>$strunassign, 'src'=>$iconenrolremove));
-                $url = new moodle_url($pageurl, array('action'=>'unassign', 'role'=>$roleid, 'user'=>$userid));
+                $url = new moodle_url($pageurl, array('action'=>'unassign', 'roleid'=>$roleid, 'user'=>$userid));
                 $rolesoutput .= html_writer::tag('div', $role['text'] . html_writer::link($url, $icon, array('class'=>'unassignrolelink', 'rel'=>$roleid, 'title'=>$strunassign)), array('class'=>'role role_'.$roleid));
             } else {
                 $rolesoutput .= html_writer::tag('div', $role['text'], array('class'=>'role unchangeable', 'rel'=>$roleid));
diff --git a/enrol/users.php b/enrol/users.php
index d8453fb1f80e6..1101a9a28a9b1 100644
--- a/enrol/users.php
+++ b/enrol/users.php
@@ -73,7 +73,7 @@
          */
         case 'unassign':
             if (has_capability('moodle/role:assign', $manager->get_context())) {
-                $role = required_param('role', PARAM_INT);
+                $role = required_param('roleid', PARAM_INT);
                 $user = required_param('user', PARAM_INT);
                 if ($confirm && $manager->unassign_role_from_user($user, $role)) {
                     redirect($PAGE->url);
@@ -81,7 +81,7 @@
                     $user = $DB->get_record('user', array('id'=>$user), '*', MUST_EXIST);
                     $allroles = $manager->get_all_roles();
                     $role = $allroles[$role];
-                    $yesurl = new moodle_url($PAGE->url, array('action'=>'unassign', 'role'=>$role->id, 'user'=>$user->id, 'confirm'=>1, 'sesskey'=>sesskey()));
+                    $yesurl = new moodle_url($PAGE->url, array('action'=>'unassign', 'roleid'=>$role->id, 'user'=>$user->id, 'confirm'=>1, 'sesskey'=>sesskey()));
                     $message = get_string('unassignconfirm', 'role', array('user'=>fullname($user, true), 'role'=>$role->localname));
                     $pagetitle = get_string('unassignarole', 'role', $role->localname);
                     $pagecontent = $OUTPUT->confirm($message, $yesurl, $PAGE->url);