--- dll/win32/msafd/misc/dllmain.c
+++ dll/win32/msafd/misc/dllmain.c
@@ -2455,6 +2455,11 @@ WSPIoctl(IN  SOCKET Handle,
             Errno = NO_ERROR;
             Ret = NO_ERROR;
             break;
+        case SIO_ADDRESS_LIST_CHANGE:
+            NeedsCompletion = FALSE;
+            Errno = WSA_IO_PENDING;
+            Ret = SOCKET_ERROR;
+            break;
         default:
             Errno = Socket->HelperData->WSHIoctl(Socket->HelperContext,
                                                  Handle,