diff --git a/src/TaskIt/TKTWatchDog.class.st b/src/TaskIt/TKTWatchDog.class.st
index 7805a12a3b3..da8ba447094 100644
--- a/src/TaskIt/TKTWatchDog.class.st
+++ b/src/TaskIt/TKTWatchDog.class.st
@@ -26,6 +26,7 @@ TKTWatchDog class >> onDuty [
 { #category : #reseting }
 TKTWatchDog class >> reset [
 	
+	onDuty ifNotNil: [ onDuty stop ].
 	onDuty := nil.
 ]