diff --git a/fhem/FHEM/31_HUEDevice.pm b/fhem/FHEM/31_HUEDevice.pm
index de775ee68..d9780a7dc 100644
--- a/fhem/FHEM/31_HUEDevice.pm
+++ b/fhem/FHEM/31_HUEDevice.pm
@@ -1498,7 +1498,8 @@ HUEDevice_Attr($$$;$)
Notes:
all_on
and any_on
readings,
+ with older firmware versions groups have no readings.