diff --git a/admin/mnet/peer_forms.php b/admin/mnet/peer_forms.php
index 659a56c8989..1ff7293b9cf 100644
--- a/admin/mnet/peer_forms.php
+++ b/admin/mnet/peer_forms.php
@@ -78,9 +78,13 @@ class mnet_review_host_form extends moodleform {
         $mnet_peer = $this->_customdata['peer'];
 
         $mform->addElement('hidden', 'last_connect_time');
+        $mform->setType('last_connect_time', PARAM_INT);
         $mform->addElement('hidden', 'id');
+        $mform->setType('id', PARAM_INT);
         $mform->addElement('hidden', 'applicationid');
+        $mform->setType('applicationid', PARAM_INT);
         $mform->addElement('hidden', 'oldpublickey');
+        $mform->setType('oldpublickey', PARAM_PEM);
 
         $mform->addElement('text', 'name', get_string('site'), array('maxlength' => 80, 'size' => 50));
         $mform->setType('name', PARAM_NOTAGS);
@@ -148,6 +152,7 @@ class mnet_review_host_form extends moodleform {
             $mform->addGroup($radioarray, 'radioar', get_string('deleted'), array(' ', ' '), false);
         } else {
             $mform->addElement('hidden', 'deleted');
+            $mform->setType('deleted', PARAM_BOOL);
         }
 
         // finished with static stuff, print save button
diff --git a/admin/mnet/profilefields_form.php b/admin/mnet/profilefields_form.php
index 30b4b9e5662..8ef44569dd5 100644
--- a/admin/mnet/profilefields_form.php
+++ b/admin/mnet/profilefields_form.php
@@ -50,6 +50,8 @@ class mnet_profile_form extends moodleform {
         }
 
         $mform->addElement('hidden', 'hostid', $this->_customdata['hostid']);
+        $mform->setType('hostid', PARAM_INT);
+
         $fields = mnet_profile_field_options();
 
         // Fields to import ----------------------------------------------------
diff --git a/admin/mnet/services_form.php b/admin/mnet/services_form.php
index 497eead82ed..63607e1f9cb 100644
--- a/admin/mnet/services_form.php
+++ b/admin/mnet/services_form.php
@@ -39,6 +39,7 @@ class mnet_services_form extends moodleform {
         $myservices = mnet_get_service_info($mnet_peer);
 
         $mform->addElement('hidden', 'hostid', $mnet_peer->id);
+        $mform->setType('hostid', PARAM_INT);
 
         $count = 0;
         foreach ($myservices as $name => $versions) {
@@ -55,6 +56,8 @@ class mnet_services_form extends moodleform {
             $mform->addElement('html', '<h3>' .  get_string($name.'_name', $langmodule , $mnet_peer->name) . '</h3>' . get_string($name.'_description', $langmodule, $mnet_peer->name));
 
             $mform->addElement('hidden', 'exists[' . $version['serviceid'] . ']', 1);
+            // Temporary fix until MDL-38885 gets integrated.
+            $mform->setType('exists', PARAM_BOOL);
 
             $pubstr = get_string('publish','mnet');
             if (!empty($version['hostsubscribes'])) {