diff --git a/fhem/CHANGED b/fhem/CHANGED
index 5c13106ea..596cc0aa3 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:  73_AutoShuttersControl: fix _IsDay Fn
  - feature: 73_AutoShuttersControl: add holidayWeekend support for brightness
  - bugfix:  73_AutoShuttersControl: fix PrivacyDownStatus in Brightness,
                        add set brightness average max objects in array attribut
diff --git a/fhem/FHEM/73_AutoShuttersControl.pm b/fhem/FHEM/73_AutoShuttersControl.pm
index cc41471b3..737599d06 100644
--- a/fhem/FHEM/73_AutoShuttersControl.pm
+++ b/fhem/FHEM/73_AutoShuttersControl.pm
@@ -3458,8 +3458,8 @@ sub _IsDay($) {
 
     if (
         (
-               $shutters->getModeDown eq 'brightness'
-            or $shutters->getModeUp eq 'brightness'
+               $shutters->getDown eq 'brightness'
+            or $shutters->getUp eq 'brightness'
         )
         or (
             (