diff -r f2f12297e904 -r 159762ee0f2d src/win32/libc_interface.h
--- a/src/win32/libc_interface.h	Wed Jul 28 00:51:27 2004 +0000
+++ b/src/win32/libc_interface.h	Wed Jul 28 04:25:32 2004 +0000
@@ -41,7 +41,7 @@
 #define getsockopt( args... ) \
 wgaim_getsockopt( args )
 
-extern int wgaim_setsockopt(int socket, int level, int optname, void *optval, socklen_t optlen);
+extern int wgaim_setsockopt(int socket, int level, int optname, const void *optval, socklen_t optlen);
 #define setsockopt( args... ) \
 wgaim_setsockopt( args )