diff --git a/lauxlib.c b/lauxlib.c
index 06a5882d..0ad4cc59 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.262 2014/04/15 18:25:49 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.263 2014/05/12 21:44:17 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -413,26 +413,11 @@ LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) {
 }
 
 
-LUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int arg) {
-  int isnum;
-  lua_Unsigned d = lua_tounsignedx(L, arg, &isnum);
-  if (!isnum)
-    interror(L, arg);
-  return d;
-}
-
-
 LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg,
                                                       lua_Integer def) {
   return luaL_opt(L, luaL_checkinteger, arg, def);
 }
 
-
-LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int arg,
-                                                        lua_Unsigned def) {
-  return luaL_opt(L, luaL_checkunsigned, arg, def);
-}
-
 /* }====================================================== */
 
 
diff --git a/lauxlib.h b/lauxlib.h
index d3ed988a..866f66af 100644
--- a/lauxlib.h
+++ b/lauxlib.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.123 2014/01/05 14:04:46 roberto Exp roberto $
+** $Id: lauxlib.h,v 1.124 2014/04/15 18:25:49 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -46,9 +46,6 @@ LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
 LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
 LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
                                           lua_Integer def);
-LUALIB_API lua_Unsigned (luaL_checkunsigned) (lua_State *L, int arg);
-LUALIB_API lua_Unsigned (luaL_optunsigned) (lua_State *L, int arg,
-                                            lua_Unsigned def);
 
 LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
 LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
@@ -211,6 +208,22 @@ LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
 #endif
 
 
+/*
+** {============================================================
+** Compatibility with deprecated unsigned conversions
+** =============================================================
+*/
+#if defined(LUA_COMPAT_APIUNSIGNED)
+
+#define luaL_checkunsigned(L,a)		((lua_Unsigned)luaL_checkinteger(L,a))
+#define luaL_optunsigned(L,a,d)	\
+	((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
+
+#endif
+/* }============================================================ */
+
+
+
 #endif
 
 
diff --git a/lmathlib.c b/lmathlib.c
index 711f1d3a..1e5c3ede 100644
--- a/lmathlib.c
+++ b/lmathlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c,v 1.102 2014/06/02 23:09:28 roberto Exp roberto $
+** $Id: lmathlib.c,v 1.103 2014/06/18 12:35:53 roberto Exp roberto $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -257,7 +257,7 @@ static int math_random (lua_State *L) {
 
 
 static int math_randomseed (lua_State *L) {
-  l_srand((unsigned int)luaL_checkunsigned(L, 1));
+  l_srand((unsigned int)(lua_Integer)luaL_checknumber(L, 1));
   (void)rand(); /* discard first value to avoid undesirable correlations */
   return 0;
 }
diff --git a/ltests.c b/ltests.c
index 25ada591..f72d413c 100644
--- a/ltests.c
+++ b/ltests.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.c,v 2.172 2014/06/17 17:13:29 roberto Exp roberto $
+** $Id: ltests.c,v 2.173 2014/06/19 18:29:30 roberto Exp roberto $
 ** Internal Module for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -1263,9 +1263,6 @@ static struct X { int x; } x;
       const char *s1 = lua_pushstring(L1, s);
       lua_assert((s == NULL && s1 == NULL) || (strcmp)(s, s1) == 0);
     }
-    else if EQ("tounsigned") {
-      lua_pushinteger(L1, (lua_Integer)lua_tounsigned(L1, getindex));
-    }
     else if EQ("type") {
       lua_pushstring(L1, luaL_typename(L1, getnum));
     }
diff --git a/lua.h b/lua.h
index 5beb5411..812df98f 100644
--- a/lua.h
+++ b/lua.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.306 2014/05/13 19:40:28 roberto Exp roberto $
+** $Id: lua.h,v 1.307 2014/06/10 17:41:38 roberto Exp roberto $
 ** Lua - A Scripting Language
 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
 ** See Copyright Notice at the end of this file
@@ -175,7 +175,6 @@ LUA_API const char     *(lua_typename) (lua_State *L, int tp);
 
 LUA_API lua_Number      (lua_tonumberx) (lua_State *L, int idx, int *isnum);
 LUA_API lua_Integer     (lua_tointegerx) (lua_State *L, int idx, int *isnum);
-LUA_API lua_Unsigned    (lua_tounsignedx) (lua_State *L, int idx, int *isnum);
 LUA_API int             (lua_toboolean) (lua_State *L, int idx);
 LUA_API const char     *(lua_tolstring) (lua_State *L, int idx, size_t *len);
 LUA_API size_t          (lua_rawlen) (lua_State *L, int idx);
@@ -220,7 +219,6 @@ LUA_API int   (lua_compare) (lua_State *L, int idx1, int idx2, int op);
 LUA_API void        (lua_pushnil) (lua_State *L);
 LUA_API void        (lua_pushnumber) (lua_State *L, lua_Number n);
 LUA_API void        (lua_pushinteger) (lua_State *L, lua_Integer n);
-LUA_API void        (lua_pushunsigned) (lua_State *L, lua_Unsigned n);
 LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t l);
 LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
 LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
@@ -326,14 +324,13 @@ LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 
 
 /*
-** ===============================================================
+** {==============================================================
 ** some useful macros
 ** ===============================================================
 */
 
 #define lua_tonumber(L,i)	lua_tonumberx(L,(i),NULL)
 #define lua_tointeger(L,i)	lua_tointegerx(L,(i),NULL)
-#define lua_tounsigned(L,i)	lua_tounsignedx(L,(i),NULL)
 
 #define lua_pop(L,n)		lua_settop(L, -(n)-1)
 
@@ -365,6 +362,22 @@ LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 
 #define lua_remove(L,idx)	(lua_rotate(L, (idx), -1), lua_pop(L, 1))
 
+/* }============================================================== */
+
+
+/*
+** {==============================================================
+** compatibility macros for unsigned conversions
+** ===============================================================
+*/
+#if defined(LUA_COMPAT_APIUNSIGNED)
+
+#define lua_pushunsigned(L,n)	lua_pushinteger(L, (lua_Integer)(n))
+#define lua_tounsignedx(L,i,is)	((lua_Integer)lua_tointegerx(L,i,is))
+#define lua_tounsigned(L,i)	lua_tounsignedx(L,(i),NULL)
+
+#endif
+/* }============================================================== */
 
 /*
 ** {======================================================================
diff --git a/luaconf.h b/luaconf.h
index 45451660..65ee1eff 100644
--- a/luaconf.h
+++ b/luaconf.h
@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.207 2014/06/10 19:21:20 roberto Exp roberto $
+** $Id: luaconf.h,v 1.208 2014/06/24 17:02:00 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -280,6 +280,12 @@
 */
 #define LUA_COMPAT_BITLIB
 
+/*
+@@ LUA_COMPAT_APIUNSIGNED controls the presence of macros for
+** manipulating unsigned integers (lua_pushunsigned, lua_tounsigned, etc.)
+*/
+#define LUA_COMPAT_APIUNSIGNED
+
 
 /*
 @@ LUA_COMPAT_FLOATSTRING makes Lua format integral floats without a