diff --git a/homeassistant/components/demo/lock.py b/homeassistant/components/demo/lock.py
index 7eabf9bea2d..af61c0f6111 100644
--- a/homeassistant/components/demo/lock.py
+++ b/homeassistant/components/demo/lock.py
@@ -97,3 +97,4 @@ class DemoLock(LockEntity):
         """Flag supported features."""
         if self._openable:
             return SUPPORT_OPEN
+        return 0