diff --git a/buttond.py b/buttond.py
index 57d0023..7afa2ee 100755
--- a/buttond.py
+++ b/buttond.py
@@ -54,8 +54,8 @@ for b in config.get('button', 'names').split(','):
         print('init button on GPIO', p)
         _buttons[b] = Button(p)
         # connect button callbacks to anonymous functions
-        _buttons[b].when_pressed = lambda: activate(closed)
-        _buttons[b].when_released = lambda: activate(opened)
+        _buttons[b].when_pressed = lambda path=closed: activate(path)
+        _buttons[b].when_released = lambda path=opened: activate(path)
     except (KeyError, GPIODeviceError) as e:
         print('Error configuring button', b, e)
         continue