diff --git a/fhem/FHEM/10_MAX.pm b/fhem/FHEM/10_MAX.pm
index ccc9bf20a..8c60515de 100755
--- a/fhem/FHEM/10_MAX.pm
+++ b/fhem/FHEM/10_MAX.pm
@@ -264,7 +264,8 @@ MAX_Parse($$)
 
     readingsBeginUpdate($shash);
     readingsBulkUpdate($shash, "battery", $batterylow ? "low" : "ok");
-    readingsBulkUpdate($shash, "desiredTemperature", $temperaturesetpoint);
+    #This formatting must match with in MAX_Set:$templist
+    readingsBulkUpdate($shash, "desiredTemperature", sprintf("%2.1f",$temperaturesetpoint));
     readingsBulkUpdate($shash, "valveposition", $valveposition);
     if($measuredTemperature ne "") {
       readingsBulkUpdate($shash, "temperature", $measuredTemperature);