diff --git a/hassio/dbus/__init__.py b/hassio/dbus/__init__.py
index cc20e3f83..a7cb5651b 100644
--- a/hassio/dbus/__init__.py
+++ b/hassio/dbus/__init__.py
@@ -1,6 +1,7 @@
 """DBus interface objects."""
 
 from .systemd import Systemd
+from ..coresys import CoreSysAttributes
 
 
 class DBusManager(CoreSysAttributes):