diff --git a/controller.py b/controller.py
index 0ff8b88c4e95b26be769a9a27e5fbb7ee0cc7ec4..c91e4fdd4ec0048bf90a91b5dd4e8b7a94f93486 100644
--- a/controller.py
+++ b/controller.py
@@ -134,9 +134,9 @@ class Controller:
         :param bool moving: Indicates if the robot is moving
         """
         distance = self._get_robust_distance(sensor, moving)
-        if distance < sensor.low:
+        if distance < sensor.sensor.low:
             return (HCSR04Event.DANGER, distance)
-        if distance < sensor.high:
+        if distance < sensor.sensor.high:
             return (HCSR04Event.WALL, distance)
         return (HCSR04Event.NOTHING, distance)