diff --git a/fhem/contrib/DS_Starter/76_SolarForecast.pm b/fhem/contrib/DS_Starter/76_SolarForecast.pm
index 759c4ed3e..e0e2fc3a5 100644
--- a/fhem/contrib/DS_Starter/76_SolarForecast.pm
+++ b/fhem/contrib/DS_Starter/76_SolarForecast.pm
@@ -3739,10 +3739,10 @@ sub forecastGraphic {                                 ## no critic 'complexity'
 
       if ($offset < 0) {
           if ($i <= abs($offset)) {                                                                     # $daystr stimmt nur nach Mitternacht, vor Mitternacht muß $hfcg->{0}{day_str} als Basis verwendet werden !
-              my $ds = strftime "%d", localtime($hfcg->{0}{mktime} - (3600 * abs(($offset)+$i)));       # V0.49.4
+              my $ds = strftime "%d", localtime($hfcg->{0}{mktime} - (3600 * abs($offset+$i)));         # V0.49.4
 
               # Sonderfall Mitternacht
-              $ds   = strftime "%d", localtime($hfcg->{0}{mktime} - (3600 * (abs($offset)-$i+1))) if ($hfcg->{$i}{time} == 24);
+              $ds   = strftime "%d", localtime($hfcg->{0}{mktime} - (3600 * (abs($offset-$i+1)))) if ($hfcg->{$i}{time} == 24);  # V0.49.4
               
               $val1 = HistoryVal ($hash, $ds, $hfcg->{$i}{time_str}, "pvfc",  0);
               $val2 = HistoryVal ($hash, $ds, $hfcg->{$i}{time_str}, "pvrl",  0);