diff --git a/lualib/skynet/socketchannel.lua b/lualib/skynet/socketchannel.lua
index 3054de43..251ecc28 100644
--- a/lualib/skynet/socketchannel.lua
+++ b/lualib/skynet/socketchannel.lua
@@ -321,7 +321,10 @@ local function connect_once(self)
 
 		self.__sock = setmetatable( {fd} , channel_socket_meta )
 		self.__dispatch_thread = skynet.fork(function()
-			pcall(dispatch_function(self), self)
+			if self.__sock then
+				-- self.__sock can be false (socket closed) if error during connecting, See #1513
+				pcall(dispatch_function(self), self)
+			end
 			-- clear dispatch_thread
 			self.__dispatch_thread = nil
 		end)