diff --git a/blocks/edit_form.php b/blocks/edit_form.php
index 169c54de4ea..31eadf60521 100644
--- a/blocks/edit_form.php
+++ b/blocks/edit_form.php
@@ -89,6 +89,7 @@ class block_edit_form extends moodleform {
 
         $parentcontext = context::instance_by_id($this->block->instance->parentcontextid);
         $mform->addElement('hidden', 'bui_parentcontextid', $parentcontext->id);
+        $mform->setType('bui_parentcontextid', PARAM_INT);
 
         $mform->addElement('static', 'bui_homecontext', get_string('createdat', 'block'), print_context_name($parentcontext));
         $mform->addHelpButton('bui_homecontext', 'createdat', 'block');
@@ -114,6 +115,7 @@ class block_edit_form extends moodleform {
 
         // Let the form to know about that, can be useful later
         $mform->addElement('hidden', 'bui_editingatfrontpage', (int)$editingatfrontpage);
+        $mform->setType('bui_editingatfrontpage', PARAM_INT);
 
         // Front page, show the page-contexts element and set $pagetypelist to 'any page' (*)
         // as unique option. Processign the form will do any change if needed
@@ -145,6 +147,7 @@ class block_edit_form extends moodleform {
             $contextoptions[BUI_CONTEXTS_CURRENT_SUBS] = get_string('showoncontextandsubs', 'block', $parentcontextname);
             $mform->addElement('select', 'bui_contexts', get_string('contexts', 'block'), $contextoptions);
         }
+        $mform->setType('bui_contexts', PARAM_INT);
 
         // Generate pagetype patterns by callbacks if necessary (has not been set specifically)
         if (empty($pagetypelist)) {
@@ -175,6 +178,7 @@ class block_edit_form extends moodleform {
             $values = array_keys($pagetypelist);
             $value = array_pop($values);
             $mform->addElement('hidden', 'bui_pagetypepattern', $value);
+            $mform->setType('bui_pagetypepattern', PARAM_RAW);
             // Now we are really hiding a lot (both page-contexts and page-type-patterns),
             // specially in some systemcontext pages having only one option (my/user...)
             // so, until it's decided if we are going to add the 'bring-back' pattern to
@@ -199,6 +203,7 @@ class block_edit_form extends moodleform {
         if ($this->page->subpage) {
             if ($parentcontext->contextlevel == CONTEXT_USER) {
                 $mform->addElement('hidden', 'bui_subpagepattern', '%@NULL@%');
+                $mform->setType('bui_subpagepattern', PARAM_RAW);
             } else {
                 $subpageoptions = array(
                     '%@NULL@%' => get_string('anypagematchingtheabove', 'block'),