diff --git a/liolib.c b/liolib.c
index 6f3bdc50..8f206d32 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,17 +1,17 @@
 /*
-** $Id: liolib.c,v 2.110 2013/03/20 19:40:07 roberto Exp roberto $
+** $Id: liolib.c,v 2.111 2013/03/21 13:57:27 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
 
 
 /*
-** POSIX idiosyncrasy!
 ** This definition must come before the inclusion of 'stdio.h'; it
 ** should not affect non-POSIX systems
 */
 #if !defined(_FILE_OFFSET_BITS)
-#define _FILE_OFFSET_BITS 64
+#define	_LARGEFILE_SOURCE	1
+#define _FILE_OFFSET_BITS	64
 #endif
 
 
@@ -80,36 +80,37 @@
 
 /*
 ** {======================================================
-** lua_fseek/lua_ftell: configuration for longer offsets
+** lua_fseek: configuration for longer offsets
 ** =======================================================
 */
 
-#if !defined(lua_fseek)	/* { */
+#if !defined(lua_fseek)	&& !defined(LUA_ANSI)	/* { */
 
-#if defined(LUA_USE_POSIX)
+#if defined(LUA_USE_POSIX)	/* { */
 
 #define l_fseek(f,o,w)		fseeko(f,o,w)
 #define l_ftell(f)		ftello(f)
 #define l_seeknum		off_t
 
 #elif defined(LUA_WIN) && !defined(_CRTIMP_TYPEINFO) \
-   && defined(_MSC_VER) && (_MSC_VER >= 1400)
+   && defined(_MSC_VER) && (_MSC_VER >= 1400)	/* }{ */
 /* Windows (but not DDK) and Visual C++ 2005 or higher */
 
 #define l_fseek(f,o,w)		_fseeki64(f,o,w)
 #define l_ftell(f)		_ftelli64(f)
 #define l_seeknum		__int64
 
-#else
+#endif	/* } */
 
+#endif			/* } */
+
+
+#if !defined(l_fseek)		/* default definitions */
 #define l_fseek(f,o,w)		fseek(f,o,w)
 #define l_ftell(f)		ftell(f)
 #define l_seeknum		long
-
 #endif
 
-#endif			/* } */
-
 /* }====================================================== */