diff --git a/src/applications/model/onoff-application.cc b/src/applications/model/onoff-application.cc
index d00254664..76d6c58a0 100644
--- a/src/applications/model/onoff-application.cc
+++ b/src/applications/model/onoff-application.cc
@@ -142,6 +142,7 @@ OnOffApplication::DoDispose (void)
 {
   NS_LOG_FUNCTION (this);
 
+  CancelEvents ();
   m_socket = 0;
   // chain up
   Application::DoDispose ();