diff --git a/dkjson.lua b/dkjson.lua
index f9e50b5..4ac4a13 100644
--- a/dkjson.lua
+++ b/dkjson.lua
@@ -58,8 +58,6 @@ if register_global_module_table then
   _G[global_module_name] = json
 end
 
-local _ENV = nil -- blocking globals in Lua 5.2
-
 pcall (function()
   -- Enable access to blocked metatables.
   -- Don't worry, this module doesn't change anything in them.