diff --git a/src/actions/HangAction.lua b/src/actions/HangAction.lua
index f96b48e..0a937b1 100644
--- a/src/actions/HangAction.lua
+++ b/src/actions/HangAction.lua
@@ -145,7 +145,7 @@ function _M.startBattleRpc(agent, data)
 	_BattleKey = tostring(math.random())
 
 	role:checkTaskEnter("HangBattle", {id = carbonId})
-	SendPacket(actionCodes.Hang_startBattleRpc, MsgPack.pack({key = key}))
+	SendPacket(actionCodes.Hang_startBattleRpc, MsgPack.pack({key = _BattleKey}))
 	return true
 end
 
--
libgit2 0.21.2