diff --git a/src/unix.h b/src/unix.h
index 8cc7a79..a1674ef 100644
--- a/src/unix.h
+++ b/src/unix.h
@@ -7,16 +7,13 @@
 * This module is just an example of how to extend LuaSocket with a new 
 * domain.
 \*=========================================================================*/
+#include "luasocket.h"
 #include "lua.h"
 
 #include "buffer.h"
 #include "timeout.h"
 #include "socket.h"
 
-#ifndef UNIX_API
-#define UNIX_API extern
-#endif
-
 typedef struct t_unix_ {
     t_socket sock;
     t_io io;
@@ -25,6 +22,6 @@ typedef struct t_unix_ {
 } t_unix;
 typedef t_unix *p_unix;
 
-UNIX_API int luaopen_socket_unix(lua_State *L);
+LUASOCKET_API int luaopen_socket_unix(lua_State *L);
 
 #endif /* UNIX_H */