diff --git a/adafruit_featherwing/minitft_featherwing.py b/adafruit_featherwing/minitft_featherwing.py
index 4c85d9b..3c73956 100755
--- a/adafruit_featherwing/minitft_featherwing.py
+++ b/adafruit_featherwing/minitft_featherwing.py
@@ -102,7 +102,7 @@ def backlight(self, brightness):
         """
         Set the backlight duty cycle
         """
-        self._backlight.duty_cycle = int(255 * min(max(1 - brightness, 0.0), 1.0))
+        self._backlight.duty_cycle = int(255 * min(max(brightness, 0.0), 1.0))
 
     @property
     def buttons(self):