diff --git a/function/rooms.py b/function/rooms.py
index c4f0e28..f3d2469 100644
--- a/function/rooms.py
+++ b/function/rooms.py
@@ -22,7 +22,7 @@ class room(object):
         logger.info("Switching all off \"%s\"", type(self).__name__)
         for name, obj in inspect.getmembers(self):
             try:
-                if obj.__module__ == 'devices':
+                if obj.__module__.startswith('devices'):
                     obj.all_off()
             except AttributeError:
                 pass    # not a module or has no method all_off