diff --git a/homeassistant/components/homekit_controller/binary_sensor.py b/homeassistant/components/homekit_controller/binary_sensor.py
index 8fe6248c65e..531297dc911 100644
--- a/homeassistant/components/homekit_controller/binary_sensor.py
+++ b/homeassistant/components/homekit_controller/binary_sensor.py
@@ -50,6 +50,4 @@ class HomeKitMotionSensor(HomeKitEntity, BinarySensorDevice):
     @property
     def is_on(self):
         """Has motion been detected."""
-        if not self.available:
-            return False
         return self._on