diff --git a/lauxlib.c b/lauxlib.c
index 38bc27d4..7179507a 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.217 2010/07/02 11:38:13 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.218 2010/07/02 12:01:53 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -664,6 +664,7 @@ LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
 ** Compatibility with 5.1 module functions
 ** =======================================================
 */
+#if defined(LUA_COMPAT_MODULE)
 
 static const char *luaL_findtablex (lua_State *L, int idx,
                                     const char *fname, int szhint) {
@@ -735,6 +736,7 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
   luaL_setfuncs(L, l, nup);
 }
 
+#endif
 /* }====================================================== */
 
 /*
diff --git a/liolib.c b/liolib.c
index 48687bf8..78ddb806 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 2.89 2010/07/02 11:38:13 roberto Exp roberto $
+** $Id: liolib.c,v 2.90 2010/07/25 15:18:19 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -583,7 +583,7 @@ static void createmeta (lua_State *L) {
   luaL_newmetatable(L, LUA_FILEHANDLE);  /* create metatable for file handles */
   lua_pushvalue(L, -1);  /* push metatable */
   lua_setfield(L, -2, "__index");  /* metatable.__index = metatable */
-  luaL_register(L, NULL, flib);  /* add file methods to new metatable */
+  luaL_setfuncs(L, flib, 0);  /* add file methods to new metatable */
   lua_pop(L, 1);  /* pop new metatable */
 }
 
diff --git a/loadlib.c b/loadlib.c
index 8509b225..d655480a 100644
--- a/loadlib.c
+++ b/loadlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.87 2010/07/02 11:38:13 roberto Exp roberto $
+** $Id: loadlib.c,v 1.88 2010/07/25 15:03:37 roberto Exp roberto $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -495,11 +495,10 @@ static int ll_require (lua_State *L) {
 ** 'module' function
 ** =======================================================
 */
-
+#if defined(LUA_COMPAT_MODULE)
 
 /*
-** FOR COMPATIBILITY ONLY: changes the _ENV variable of
-** calling function
+** changes the _ENV variable of calling function
 */
 static void set_env (lua_State *L) {
   lua_Debug ar;
@@ -570,6 +569,17 @@ static int ll_seeall (lua_State *L) {
 }
 
 
+#else
+
+static int ll_seeall (lua_State *L) {
+  return luaL_error(L, "deprecated function");
+}
+
+static int ll_module (lua_State *L) {
+  return luaL_error(L, "deprecated function");
+}
+
+#endif
 /* }====================================================== */
 
 
@@ -648,7 +658,7 @@ LUAMOD_API int luaopen_package (lua_State *L) {
   lua_setfield(L, -2, "preload");
   lua_pushglobaltable(L);
   lua_pushvalue(L, -2);  /* set 'package' as upvalue for next lib */
-  luaL_openlib(L, NULL, ll_funcs, 1);  /* open lib into global table */
+  luaL_setfuncs(L, ll_funcs, 1);  /* open lib into global table */
   lua_pop(L, 1);  /* pop global table */
   return 1;  /* return 'package' table */
 }
diff --git a/ltests.c b/ltests.c
index ec70a954..5c429746 100644
--- a/ltests.c
+++ b/ltests.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.c,v 2.110 2010/06/25 12:18:10 roberto Exp roberto $
+** $Id: ltests.c,v 2.111 2010/07/02 11:38:13 roberto Exp roberto $
 ** Internal Module for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -1463,8 +1463,8 @@ int luaB_opentests (lua_State *L) {
   lua_assert(lua_getallocf(L, &ud) == debug_realloc);
   lua_assert(ud == cast(void *, &l_memcontrol));
   lua_setallocf(L, lua_getallocf(L, NULL), ud);
-  luaL_register(L, "T", tests_funcs);
-  return 0;
+  luaL_newlib(L, tests_funcs);
+  return 1;
 }
 
 #endif
diff --git a/ltests.h b/ltests.h
index 73676f64..1fc1cd37 100644
--- a/ltests.h
+++ b/ltests.h
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.h,v 2.31 2010/04/12 16:07:29 roberto Exp roberto $
+** $Id: ltests.h,v 2.32 2010/04/19 17:40:13 roberto Exp roberto $
 ** Internal Header for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -73,7 +73,8 @@ int luaB_opentests (lua_State *L);
 
 #if defined(lua_c)
 #define luaL_newstate()		lua_newstate(debug_realloc, &l_memcontrol)
-#define luaL_openlibs(L)	{ (luaL_openlibs)(L); luaB_opentests(L); }
+#define luaL_openlibs(L)  \
+  { (luaL_openlibs)(L); luaL_requiref(L, "T", luaB_opentests, 1); }
 #endif
 
 
diff --git a/luaconf.h b/luaconf.h
index 8a81f189..ad4e65f9 100644
--- a/luaconf.h
+++ b/luaconf.h
@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.140 2010/07/18 14:34:45 roberto Exp roberto $
+** $Id: luaconf.h,v 1.141 2010/07/25 15:02:41 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -273,6 +273,12 @@
 /* compatibility with previous wrong spelling */
 #define luaL_typerror		luaL_typeerror
 
+/*
+@@ LUA_COMPAT_MODULE controls compatibility with previous
+** module functions 'module' (Lua) and 'luaL_register' (C).
+*/
+#define LUA_COMPAT_MODULE
+
 #endif  /* LUA_COMPAT_ALL */
 
 /* }================================================================== */