diff --git a/platypush/plugins/pwm/pca9685.py b/platypush/plugins/pwm/pca9685.py
index b9a3c3ce..f3396925 100644
--- a/platypush/plugins/pwm/pca9685.py
+++ b/platypush/plugins/pwm/pca9685.py
@@ -107,6 +107,7 @@ class PwmPca9685Plugin(Plugin):
             return
 
         self._pca.deinit()
+        self._pca = None
 
     @action
     def reset(self):