diff --git a/mod/book/view.php b/mod/book/view.php
index 0340fd6d174..0c57b2ed048 100644
--- a/mod/book/view.php
+++ b/mod/book/view.php
@@ -204,7 +204,7 @@ book_view($book, $chapter, $islastchapter, $course, $cm, $context);
 // =====================================================
 
 echo $OUTPUT->header();
-echo $OUTPUT->heading($book->name);
+echo $OUTPUT->heading(format_string($book->name));
 
 $navclasses = book_get_nav_classes();