diff --git a/lib/logitech_receiver/hidpp20.py b/lib/logitech_receiver/hidpp20.py
index 5dbfadef..6185b70f 100644
--- a/lib/logitech_receiver/hidpp20.py
+++ b/lib/logitech_receiver/hidpp20.py
@@ -88,6 +88,7 @@ FEATURE = _NamedInts(
     BACKLIGHT=0x1981,
     BACKLIGHT2=0x1982,
     BACKLIGHT3=0x1983,
+    ILLUMINATION=0x1990,
     PRESENTER_CONTROL=0x1A00,
     SENSOR_3D=0x1A01,
     REPROG_CONTROLS=0x1B00,