diff --git a/fhem/FHEM/01_FHEMWEB.pm b/fhem/FHEM/01_FHEMWEB.pm
index 3e46fb00c..4ffd1112b 100644
--- a/fhem/FHEM/01_FHEMWEB.pm
+++ b/fhem/FHEM/01_FHEMWEB.pm
@@ -1455,7 +1455,7 @@ FW_doDetail($)
   my ($d) = @_;
 
   return if($FW_hiddenroom{detail});
-  return if(!defined($defs{$d}));
+  return if(!defined($defs{$d}) || !devspec2array($d,$FW_chash));#check allowed
   my $h = $defs{$d};
   my $t = $h->{TYPE};
   $t = "MISSING" if(!defined($t));