diff --git a/lib/CMTD/Helpers.pm b/lib/CMTD/Helpers.pm
index 064123a..abbcd14 100644
--- a/lib/CMTD/Helpers.pm
+++ b/lib/CMTD/Helpers.pm
@@ -72,6 +72,10 @@ sub register {
     my ($c, $pid) = @_;
     return $self->app->db->select('comments', '*', {pid => $pid}, 'seq')->hashes;
   });
+  $app->helper(captcha_by_id => sub {
+    my ($c, $cid) = @_;
+    return $self->app->db->select('captcha', '*', {cid => $cid})->hash;
+  });
   $app->helper(add_page => sub {
     my ($c, $sid, $page) = @_;
     $self->app->db->insert('pages', {