diff --git a/driver/als_si114x.c b/driver/als_si114x.c
index f11a2100db..e3cb87a2a4 100644
--- a/driver/als_si114x.c
+++ b/driver/als_si114x.c
@@ -96,7 +96,7 @@ static int si114x_read_results(struct motion_sensor_t *s, int nb)
 		/* Add offset, calibration */
 		if (val + type_data->offset <= 0) {
 			val = 1;
-		} else {
+		} else if (val != SI114X_OVERFLOW) {
 			val += type_data->offset;
 			/*
 			 * Proxmitiy sensor data is inverse of the distance.
diff --git a/driver/als_si114x.h b/driver/als_si114x.h
index c044a8bddf..93e9b9a9bc 100644
--- a/driver/als_si114x.h
+++ b/driver/als_si114x.h
@@ -206,6 +206,7 @@
 
 /* Proximity sensor finds an object within 5 cm, disable light sensor */
 #define SI114X_COVERED_THRESHOLD        5
+#define SI114X_OVERFLOW                 0xffff
 
 extern const struct accelgyro_drv si114x_drv;