diff --git a/share/html/Ticket/Update.html b/share/html/Ticket/Update.html
index de3461e..0c41491 100755
--- a/share/html/Ticket/Update.html
+++ b/share/html/Ticket/Update.html
@@ -178,6 +178,7 @@
% $IncludeSignature = 0 if $Action ne 'Respond' && !RT->Config->Get('MessageBoxIncludeSignatureOnComment');
<& /Elements/MessageBox, Name=>"UpdateContent", IncludeSignature => $IncludeSignature, %ARGS &>
% }
+% $m->callback( %ARGS, CallbackName => 'AfterMessageBox' );
<& /Ticket/Elements/AddAttachments, %ARGS, TicketObj => $TicketObj &>