diff --git a/fhem/CHANGED b/fhem/CHANGED
index c26307916..ab2112398 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.
+ - bugfix:  12_HProtocolGateway: fix checksum
  - bugfix:  73_AutoShuttersControl: fix typo in Event RegEx for Twilight Event
  - bugfix:  73_AutoShuttersControl: fix little winrec bug then state opened
                                     (max winrec sensors)
diff --git a/fhem/FHEM/12_HProtocolGateway.pm b/fhem/FHEM/12_HProtocolGateway.pm
index b26942d69..2b3e6fe5b 100644
--- a/fhem/FHEM/12_HProtocolGateway.pm
+++ b/fhem/FHEM/12_HProtocolGateway.pm
@@ -204,7 +204,7 @@ sub HProtocolGateway_ParseMessage($$) {
       while ($sum > 255) {
         $sum = $sum - 255;
       }
-
+      $checksum = int($checksum);
       return if($sum ne $checksum);
 
     } else {