diff --git a/fhem/FHEM/96_allowed.pm b/fhem/FHEM/96_allowed.pm
index 8f0062394..b18289f6f 100644
--- a/fhem/FHEM/96_allowed.pm
+++ b/fhem/FHEM/96_allowed.pm
@@ -78,12 +78,16 @@ allowed_Authorize($$$$)
   if($type eq "cmd") {
     return 0 if(!$me->{allowedCommands});
     # Return 0: allow stacking with other instances, see Forum#46380
-    return ($me->{allowedCommands} =~ m/\b\Q$arg\E\b/) ? 0 : 2;
+    return 0 if($me->{allowedCommands} =~ m/\b\Q$arg\E\b/);
+    Log3 $me, 4, "Forbidden command $arg for $cl->{NAME}";
+    return 2;
   }
 
   if($type eq "devicename") {
     return 0 if(!$me->{allowedDevices});
-    return ($me->{allowedDevices} =~ m/\b\Q$arg\E\b/) ? 0 : 2;
+    return if($me->{allowedDevices} =~ m/\b\Q$arg\E\b/);
+    Log3 $me, 4, "Forbidden device $arg for $cl->{NAME}";
+    return 2;
   }