Bug? Error in phobos?

[Regan Heath]

import std.socket;
import std.c.windows.winsock;

pragma(lib, "wsock32.lib");

class IndexPacketReader
{
	//static void foo()  //works
	void foo()
	{
		ntohl(1);  //fails
	}
}

void main()
{
	new TcpSocket();
	//ntohl(1); //works
}

E:\D\src\tmp>dmd bug003.d
E:\D\dmd\bin\..\..\dm\bin\link.exe bug003,,,user32+kernel32/noi;
OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

E:\D\dmd\bin\..\lib\phobos.lib(winsock)  Offset 276FEH Record Type 00C3
  Error 1: Previous Definition Different : _ntohl at 4
--- errorlevel 1

Anyone know what this means?

Regan