diff --git a/lualib/skynet.lua b/lualib/skynet.lua
index ec9258b1..c4dd3578 100644
--- a/lualib/skynet.lua
+++ b/lualib/skynet.lua
@@ -52,6 +52,7 @@ local watching_service = {}
 local watching_session = {}
 local dead_service = {}
 local error_queue = {}
+local fork_queue = {}
 
 -- suspend is function
 local suspend
@@ -468,8 +469,6 @@ function skynet.dispatch_unknown_response(unknown)
 	return prev
 end
 
-local fork_queue = {}
-
 local tunpack = table.unpack
 
 function skynet.fork(func,...)