diff --git a/IPython/zmq/kernelmanager.py b/IPython/zmq/kernelmanager.py
index 5e950bc..94438e5 100644
--- a/IPython/zmq/kernelmanager.py
+++ b/IPython/zmq/kernelmanager.py
@@ -706,6 +706,9 @@ class KernelManager(Configurable):
     _stdin_channel = Any
     _hb_channel = Any
     _connection_file_written=Bool(False)
+ 	
+    def __del__(self):	  	
+        self.cleanup_connection_file()
 
     #--------------------------------------------------------------------------
     # Channel management methods: