diff --git a/lanscan.py b/lanscan.py
index a35613a..4de6f10 100644
--- a/lanscan.py
+++ b/lanscan.py
@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
 """
 Author:     skywebsys contact at gmail.com
 License:    GPL v2
@@ -14,7 +16,8 @@
 
 fin,fout=os.popen4("ip route list | grep proto | awk '{print $1}'")
 lan_network = fout.read()
-wr = csv.writer(open('mac.csv', 'wb'), delimiter=',', quoting=csv.QUOTE_ALL)
+f = open('mac.csv', 'wb')
+wr = csv.writer(f, delimiter=',', quoting=csv.QUOTE_ALL)
 
 try:
 	alive,dead=srp(Ether(dst="ff:ff:ff:ff:ff:ff")/ARP(pdst=lan_network), timeout=2, verbose=1)
@@ -29,3 +32,6 @@
 	pass
 
 
+f.close()
+
+