diff --git a/API/skynet.lua b/API/skynet.lua
index f4f6e43..73c1663 100644
--- a/API/skynet.lua
+++ b/API/skynet.lua
@@ -18,7 +18,7 @@ local CBOR = (function()
 
 	local setmetatable, getmetatable = setmetatable, getmetatable;
 	local dbg_getmetatable
-	if debug then dbg_getmetatable = debug.getmetatable else dbg_getmetatable = getmetatable end
+	-- if debug then dbg_getmetatable = debug.getmetatable else dbg_getmetatable = getmetatable end
 	local assert = assert;
 	local error = error;
 	local type = type;