diff --git a/fhem/contrib/DS_Starter/76_SolarForecast.pm b/fhem/contrib/DS_Starter/76_SolarForecast.pm
index 33b1d6eba..1e28cd606 100644
--- a/fhem/contrib/DS_Starter/76_SolarForecast.pm
+++ b/fhem/contrib/DS_Starter/76_SolarForecast.pm
@@ -14538,7 +14538,7 @@ sub __normIconScale {
             $hunit eq 'px' ? 470 * $hscale / $height * 0.96      :
             $hunit eq 'in' ? 470 * $hscale / $height * 0.0138889 :
             $hunit eq 'mm' ? 470 * $hscale / $height * 0.352778  :
-            $hunit eq 'cm' ? 470 * $hscale / $height * 28.346    :
+            $hunit eq 'cm' ? 470 * $hscale / $height * 0.0352778 :
             $hunit eq 'pc' ? 470 * $hscale / $height * 12        :
             $hscale;