diff --git a/README b/README
index 36f9e65..20963b7 100644
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
 Lua-iconv: performs character set conversions in Lua
-(c) 2005-10 Alexandre Erwin Ittner <alexandre@ittner.com.br>
+(c) 2005-11 Alexandre Erwin Ittner <alexandre@ittner.com.br>
 Project page: http://ittner.github.com/lua-iconv/
 
 
@@ -11,8 +11,8 @@ sequence of corresponding characters in another codeset. The codesets
 are those specified in the iconv.new() call that returned the conversion
 descriptor, cd.
 
-Lua-iconv 7 and later *requires* Lua 5.2. If you are using Lua 5.1, please
-use the release 6; For Lua 5.0, use the first release (lua-iconv-r1).
+Lua-iconv 7 *requires* Lua 5.1 or Lua 5.2. For Lua 5.0, use the first
+release (lua-iconv-r1).
 
 Details on iconv may be obtained in the Open Group's interface definition
 (http://www.opengroup.org/onlinepubs/007908799/xsh/iconv.h.html).
@@ -39,7 +39,7 @@ untar the distribution package and, within the program directory, type:
     make install
 
 as root. The library will be compiled and installed on the in the correct
-path (which is defined in lua5.2.pc). Compiling on systems without pkg-config
+path (which is defined in lua5.x.pc). Compiling on systems without pkg-config
 requires manual changes in the Makefile (this includes Windows).
 
 
@@ -47,7 +47,7 @@ requires manual changes in the Makefile (this includes Windows).
 === Loading and initialization ===
 
 Lua-iconv is a shared library that must be loaded in the Lua interpreter
-before use. From Lua 5.1 and later, you can simply do a
+before use. You can simply do a
 
     local iconv = require("iconv")
 
@@ -102,7 +102,7 @@ Lua-iconv is copyrighted free software: it can be used for both academic
 and commercial purposes at absolutely no cost. There are no royalties
 or GNU-like "copyleft" restrictions. The legal details are below:
 
-   Lua-iconv is (c) 2005-10 Alexandre Erwin Ittner
+   Lua-iconv is (c) 2005-11 Alexandre Erwin Ittner
 
    Permission is hereby granted, free of charge, to any person obtaining
    a copy of this software and associated documentation files (the
diff --git a/luaiconv.c b/luaiconv.c
index cec54fe..0d43524 100644
--- a/luaiconv.c
+++ b/luaiconv.c
@@ -1,6 +1,6 @@
 /*
  * luaiconv - Performs character set conversions in Lua
- * (c) 2005-10 Alexandre Erwin Ittner <alexandre@ittner.com.br>
+ * (c) 2005-11 Alexandre Erwin Ittner <alexandre@ittner.com.br>
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -39,6 +39,16 @@
 #define LIB_VERSION             LIB_NAME " 7"
 #define ICONV_TYPENAME          "iconv_t"
 
+#if LUA_VERSION_NUM < 501
+ #error "Unsuported Lua version. You must use Lua >= 5.1"
+#endif
+
+#if LUA_VERSION_NUM < 502
+ #define luaL_newlib(L, f)  { lua_newtable(L); luaL_register(L, NULL, f); }
+ #define lua_rawlen(L, i)   lua_objlen(L, i)
+#endif
+
+
 #define BOXPTR(L, p)   (*(void**)(lua_newuserdata(L, sizeof(void*))) = (p))
 #define UNBOXPTR(L, i) (*(void**)(lua_touserdata(L, i)))