diff --git a/dht/integrationplugindht.py b/dht/integrationplugindht.py
index ea45d89a..5b521719 100644
--- a/dht/integrationplugindht.py
+++ b/dht/integrationplugindht.py
@@ -51,6 +51,7 @@ def setupThing(info):
 def thingRemoved(thing):
     if len(myThings()) is 0:
         global pollTimer
+        del pollTimer
         pollTimer = None