diff --git a/homeassistant/components/alarmdecoder/binary_sensor.py b/homeassistant/components/alarmdecoder/binary_sensor.py
index 397394e256b..430a4f73262 100644
--- a/homeassistant/components/alarmdecoder/binary_sensor.py
+++ b/homeassistant/components/alarmdecoder/binary_sensor.py
@@ -111,13 +111,13 @@ class AlarmDecoderBinarySensor(BinarySensorEntity):
     def _fault_callback(self, zone):
         """Update the zone's state, if needed."""
         if zone is None or int(zone) == self._zone_number:
-            self._attr_state = 1
+            self._attr_is_on = True
             self.schedule_update_ha_state()
 
     def _restore_callback(self, zone):
         """Update the zone's state, if needed."""
         if zone is None or (int(zone) == self._zone_number and not self._loop):
-            self._attr_state = 0
+            self._attr_is_on = False
             self.schedule_update_ha_state()
 
     def _rfx_message_callback(self, message):
@@ -125,7 +125,7 @@ class AlarmDecoderBinarySensor(BinarySensorEntity):
         if self._rfid and message and message.serial_number == self._rfid:
             rfstate = message.value
             if self._loop:
-                self._attr_state = 1 if message.loop[self._loop - 1] else 0
+                self._attr_is_on = bool(message.loop[self._loop - 1])
             attr = {CONF_ZONE_NUMBER: self._zone_number}
             if self._rfid and rfstate is not None:
                 attr[ATTR_RF_BIT0] = bool(rfstate & 0x01)
@@ -150,5 +150,5 @@ class AlarmDecoderBinarySensor(BinarySensorEntity):
                 message.channel,
                 message.value,
             )
-            self._attr_state = message.value
+            self._attr_is_on = bool(message.value)
             self.schedule_update_ha_state()