diff --git a/build-number.txt b/build-number.txt
index a5c3fde..d9061d9 100644
--- a/build-number.txt
+++ b/build-number.txt
@@ -1 +1 @@
-373
+375
diff --git a/src/light_sensor.c b/src/light_sensor.c
index 0b10abe..4ec450f 100644
--- a/src/light_sensor.c
+++ b/src/light_sensor.c
@@ -89,7 +89,7 @@ void LightSensor_Poll(void)
             + LIGHTSENSOR_LOW_BOUND * range / LIGHTSENSOR_MAX;
         int high = LightSensor_MinimumBrightness
             + LIGHTSENSOR_HIGH_BOUND * range / LIGHTSENSOR_MAX;
-        LightSensor_RelativeBrightness = (LightSensor_AbsoluteBrightness - low)
+        LightSensor_RelativeBrightness = ((int)LightSensor_AbsoluteBrightness - low)
             * LIGHTSENSOR_MAX / (high - low);
         if(LightSensor_RelativeBrightness < 0)
         {