diff --git a/mod/glossary/comments.php b/mod/glossary/comments.php
index 646e32b4233..0ca4b8c9ee8 100644
--- a/mod/glossary/comments.php
+++ b/mod/glossary/comments.php
@@ -54,7 +54,7 @@
 
 /// comments
 
-    print_heading(get_string('commentson','glossary')." <b>\"$entry->concept\"</b>");
+    print_heading(format_string(get_string('commentson','glossary')." <b>\"$entry->concept\"</b>"));
 
     if ($glossary->allowcomments || isteacher($glossary->course)) {
         print_heading("<a href=\"comment.php?id=$cm->id&amp;eid=$entry->id\">$straddcomment</a> <img title=\"$straddcomment\" src=\"comment.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" />");