diff --git a/fhem/FHEM/42_SYSMON.pm b/fhem/FHEM/42_SYSMON.pm
index 867e94b05..12136a196 100644
--- a/fhem/FHEM/42_SYSMON.pm
+++ b/fhem/FHEM/42_SYSMON.pm
@@ -4125,9 +4125,9 @@ sub SYSMON_decode_time_diff($)
   my $h = int($s/3600);
   $s -= $h*3600;
   my $m = int($s/60);
-  $s -= $m*60;
-
-  return ($d,$h,$m,$s);
+  #$s -= $m*60;
+  #return ($d,$h,$m,$s);
+  return ($d,$h,$m);
 }
 
 #------------------------------------------------------------------------------