diff --git a/Arduino/Things/UltrasonicSensor.cpp b/Arduino/Things/UltrasonicSensor.cpp
index 338353e..804c2bc 100644
--- a/Arduino/Things/UltrasonicSensor.cpp
+++ b/Arduino/Things/UltrasonicSensor.cpp
@@ -65,7 +65,7 @@ UltrasonicSensor::TouchSensor::TouchSensor(Configuration config, Thing* parent)
 void UltrasonicSensor::TouchSensor::Update(bool recursive) {
   RoboidControl::TouchSensor::Update(recursive);
   this->ultrasonic.Update(false);
-  this->internalTouch |= (this->ultrasonic.distance > 0 &&
+  this->internalTouch = (this->ultrasonic.distance > 0 &&
                             this->ultrasonic.distance <= this->touchDistance);
 }