diff --git a/intercom.py b/intercom.py
index 31dd950..db77cc3 100644
--- a/intercom.py
+++ b/intercom.py
@@ -22,8 +22,8 @@ def getstationbyip(ip):
 
 
 # Escuchamos en port para peticiones de operaciones.
+serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 def listen(call_manager):
-    serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     serversocket.bind(('0.0.0.0', port))
     print('Listening address', socket.gethostname(), 'on port', port)
     serversocket.listen(5)
@@ -129,6 +129,8 @@ try:
                 _station['button state changed time'] = time.clock_gettime(time.CLOCK_MONOTONIC)
         time.sleep(0.02)
 finally:
+    print('Close listeing port ', port)
+    serversocket.close()
     for _station in stations:
         _station['red'].close()
         _station['green'].close()