diff --git a/web/lib/msgslib.ssjs b/web/lib/msgslib.ssjs
index 2cca425090450bb99e0f895a2cf1cbcb183b2142..8ec1b0875cc6836df82969947d8e94f26de2e091 100644
--- a/web/lib/msgslib.ssjs
+++ b/web/lib/msgslib.ssjs
@@ -30,7 +30,7 @@ var sub=http_request.query.msg_sub;
 if(grp=='E-Mail')
 	sub='mail';
 var s=-1;
-if(sub != undefined)
+if(sub != undefined && msg_area.sub[sub] != undefined)
 	var msgbase = new MsgBase(sub);
 var message=http_request.query.message;
 var m=parseInt(http_request.query.message);