diff --git a/Lib/socket.py b/Lib/socket.py
index 30be5c5..7ce2869 100644
--- a/Lib/socket.py
+++ b/Lib/socket.py
@@ -141,7 +141,7 @@
     'bind', 'connect', 'connect_ex', 'fileno', 'listen',
     'getpeername', 'getsockname', 'getsockopt', 'setsockopt',
     'sendall', 'setblocking',
-    'settimeout', 'gettimeout', 'shutdown')
+    'settimeout', 'gettimeout', 'shutdown', 'ioctl')
 
 if sys.platform == "riscos":
     _socketmethods = _socketmethods + ('sleeptaskw',)