fix bind arg
diff --git a/Demo/sockets/broadcast.py b/Demo/sockets/broadcast.py
index e7e6b9b..4b30143 100755
--- a/Demo/sockets/broadcast.py
+++ b/Demo/sockets/broadcast.py
@@ -7,7 +7,7 @@
 from SOCKET import *
 
 s = socket(AF_INET, SOCK_DGRAM)
-s.bind('', 0)
+s.bind(('', 0))
 s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
 
 while 1: