diff --git a/mod/forum/lib.php b/mod/forum/lib.php
index 5283d6502f7..63fbc2cecaf 100644
--- a/mod/forum/lib.php
+++ b/mod/forum/lib.php
@@ -1287,7 +1287,7 @@ function forum_make_mail_html($course, $cm, $forum, $discussion, $post, $userfro
$posthtml .= "\n\n\n";
if ($replyaddress) {
- $posttext .= "--" . get_string('deleteoriginalonreply', 'mod_forum') . "--
";
+ $posthtml .= "--" . get_string('deleteoriginalonreply', 'mod_forum') . "--
";
}
$posthtml .= ''.