diff --git a/lib/pagelib.php b/lib/pagelib.php
index 29f6c100e98..c37720b075e 100644
--- a/lib/pagelib.php
+++ b/lib/pagelib.php
@@ -918,6 +918,7 @@ class moodle_page {
      */
     public function set_title($title) {
         $title = format_string($title);
+        $title = strip_tags($title);
         $title = str_replace('"', '"', $title);
         $this->_title = $title;
     }