diff --git a/BAC0/scripts/ReadWriteScript.py b/BAC0/scripts/ReadWriteScript.py
index 1b348c67..05b85b7a 100644
--- a/BAC0/scripts/ReadWriteScript.py
+++ b/BAC0/scripts/ReadWriteScript.py
@@ -59,7 +59,7 @@ class ReadWriteScript(BasicScript, WhoisIAm, ReadProperty, WriteProperty, Simula
     :param ip='127.0.0.1': Address must be in the same subnet as the BACnet network 
         [BBMD and Foreign Device - not supported] 
     """
-    def __init__(self, ip='127.0.0.1'):
+    def __init__(self, ip=None):
         log_debug("Configurating app")
         if ip is None:
             host = HostIP()