diff --git a/3rd/lua/README b/3rd/lua/README
index a77dc6bf..efb71d70 100644
--- a/3rd/lua/README
+++ b/3rd/lua/README
@@ -1,5 +1,6 @@
 This is a modify version of lua 5.3.1 (http://www.lua.org/ftp/lua-5.3.1.tar.gz) .
 
-For detail : http://lua-users.org/lists/lua-l/2014-03/msg00489.html
-
-
+For detail , 
+  Shared Proto : http://lua-users.org/lists/lua-l/2014-03/msg00489.html
+  Shared short string table : http://blog.codingnow.com/2015/08/lua_vm_share_string.html
+  
\ No newline at end of file
diff --git a/3rd/lua/lstring.h b/3rd/lua/lstring.h
index b3cfa1b7..a28ff0a0 100644
--- a/3rd/lua/lstring.h
+++ b/3rd/lua/lstring.h
@@ -43,6 +43,8 @@ LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s);
 LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
 LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
 
+#define ENABLE_SHORT_STRING_TABLE
+
 LUA_API void luaS_initshr();
 LUA_API void luaS_exitshr();
 LUA_API void luaS_expandshr(int n);
diff --git a/skynet-src/luashrtbl.h b/skynet-src/luashrtbl.h
index 6f566038..824a0c85 100644
--- a/skynet-src/luashrtbl.h
+++ b/skynet-src/luashrtbl.h
@@ -1,11 +1,10 @@
 #ifndef LUA_SHORT_STRING_TABLE_H
 #define LUA_SHORT_STRING_TABLE_H
 
-#ifndef DISABLE_SHORT_STRING
-
 #include "lstring.h"
 
-#else
+// If you use modified lua, this macro would be defined in lstring.h
+#ifndef ENABLE_SHORT_STRING_TABLE
 
 static inline int luaS_shrinfo(lua_State *L) { return 0; }
 static inline void luaS_initshr() {}