+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' );
+ </td></tr>
+
+ <& /Ticket/Elements/AddAttachments, %ARGS, TicketObj => $TicketObj &>