diff --git a/lib/devices/vacuum.js b/lib/devices/vacuum.js
index 2c0c38e..d116bee 100644
--- a/lib/devices/vacuum.js
+++ b/lib/devices/vacuum.js
@@ -106,10 +106,10 @@ module.exports = class extends Vacuum.with(
 		this.defineProperty('side_brush_work_time', {
 			name: 'sideBrushWorkTime'
 		});
-		this.defineProperty('filterWorkTime', {
+		this.defineProperty('filter_work_time', {
 			name: 'filterWorkTime'
 		});
-		this.defineProperty('sensorDirtyTime', {
+		this.defineProperty('sensor_dirty_time', {
 			name: 'sensorDirtyTime'
 		});