diff -r f2f12297e904 -r 159762ee0f2d src/win32/libc_interface.c
--- a/src/win32/libc_interface.c	Wed Jul 28 00:51:27 2004 +0000
+++ b/src/win32/libc_interface.c	Wed Jul 28 04:25:32 2004 +0000
@@ -100,7 +100,7 @@
 	return 0;
 }
 
-int wgaim_setsockopt(int socket, int level, int optname, void *optval, socklen_t optlen) {
+int wgaim_setsockopt(int socket, int level, int optname, const void *optval, socklen_t optlen) {
 	if(setsockopt(socket, level, optname, optval, optlen) == SOCKET_ERROR ) {
 		errno = WSAGetLastError();
 		return -1;