diff --git a/fhem/CHANGED b/fhem/CHANGED
index c3909d61c..9fa67ec13 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+  - feature: 10_MQTT_DEVICE.pm: publishSet patch (Forum #648596)
   - feature: 01_FHEMWEB.pm: selectnumbers widget modifier (Forum #73188)
   - feature: 98_structure.pm: add evaluateSetResult attribute (Forum #73113)
   - feature: ESPEasy: improved defineFn if bridge port is missing, docu update
diff --git a/fhem/FHEM/10_MQTT_DEVICE.pm b/fhem/FHEM/10_MQTT_DEVICE.pm
index 8efc4f78e..4e2a542a3 100644
--- a/fhem/FHEM/10_MQTT_DEVICE.pm
+++ b/fhem/FHEM/10_MQTT_DEVICE.pm
@@ -83,7 +83,7 @@ sub Set($$$@) {
   my ($hash,$name,$command,@values) = @_;
   return "Need at least one parameters" unless defined $command;
   return "Unknown argument $command, choose one of " . join(" ", map {$hash->{sets}->{$_} eq "" ? $_ : "$_:".$hash->{sets}->{$_}} sort keys %{$hash->{sets}})
-    if(!defined($hash->{sets}->{$command}));
+    if(!defined($hash->{sets}->{$command}) && @values);
   my $msgid;
   if (@values) {
     my $value = join " ",@values;